How to Choose a Water Bottle for Hiking and Camping

Whether you're heading out for a short countryside walk, spending a weekend camping or tackling a multi-day hiking route, carrying enough drinking water is essential. But with so many different water bottles available, choosing the right one isn't always straightforward.

Water bottles vary in material, capacity, weight, insulation and lid design. Some are built for everyday use, while others are designed to save space, withstand demanding conditions or keep drinks hot and cold for longer.

In this guide, we'll explain the main types of outdoor water bottles, what to look for when buying one and how to choose the best option for your activities.

What Makes a Good Hiking Water Bottle?

A good hiking water bottle should be reliable, comfortable to carry and easy to drink from. The ideal design depends on where you're going, how much water you need and how you intend to transport it.

Consider these factors before buying:

• Capacity: How much water can it hold?
• Weight: How much does the empty bottle weigh?
• Material: Is it made from stainless steel, plastic or a flexible material?
• Durability: Will it withstand knocks and regular outdoor use?
• Lid design: Can you open, drink from and refill it easily?
• Cleaning: Can you reach the inside and clean all the components?
• Insulation: Do you need to keep drinks hot or cold?
• Packability: Will it fit your rucksack's bottle pockets?

There is no single water bottle that is perfect for every situation. A lightweight bottle may be ideal for a day hike, while an insulated stainless steel bottle may be preferable for everyday use or colder conditions.

Different Types of Water Bottles

Stainless Steel Water Bottles

Stainless steel water bottles are popular because they are durable, reusable and suitable for a wide range of outdoor activities.

They are generally resistant to impacts and do not retain flavours as readily as some plastic bottles, provided they are cleaned properly.

Advantages include:

• Durable construction.
• Suitable for repeated use.
• Easy-to-clean designs on many models.
• Available in both insulated and non-insulated versions.
• A good choice for everyday use and outdoor activities.

The main disadvantage is weight. Stainless steel bottles are often heavier than equivalent plastic designs, particularly when insulated.

Brands such as Klean Kanteen offer stainless steel drinking bottles designed for everyday use, travel and outdoor adventures.

Plastic Water Bottles

Reusable plastic bottles are often lightweight, affordable and practical for walking, hiking and camping.

Many are designed with wide openings, making them easy to fill and clean.

Advantages include:

• Low empty weight.
• Often less expensive than stainless steel alternatives.
• Available in a wide range of capacities.
• Useful for backpacking and day hiking.
• Some designs make it easy to see how much water remains.

However, plastic bottles can become scratched or damaged over time. Some may also retain odours or flavours if not cleaned thoroughly.

Choose bottles specifically designed for repeated food and drink use, and follow the manufacturer's guidance on cleaning and temperature limits.

Insulated Water Bottles

Insulated water bottles are designed to slow down temperature changes, helping cold drinks stay cold and hot drinks remain warm for longer.

Most use double-wall vacuum insulation, which reduces heat transfer between the contents and the surrounding environment.

Insulated bottles are particularly useful for:

• Keeping drinking water cool during warm-weather walks.
• Carrying hot drinks during winter outings.
• Commuting and everyday use.
• Camping trips where temperature retention is important.

The main drawbacks are increased weight and bulk compared with non-insulated bottles.

If your priority is carrying the lightest possible equipment, a standard bottle may be more suitable.

Collapsible and Foldable Water Bottles

Collapsible water bottles and flexible water containers are designed to take up less space when empty.

They can be particularly useful when travelling, backpacking or carrying additional water capacity for longer trips.

Advantages include:

• Compact storage when empty.
• Often lightweight.
• Useful as additional water containers.
• Convenient for travel and backpacking.

However, flexible bottles may be less convenient to drink from with one hand and can be more difficult to clean or dry thoroughly, depending on their design.

They may also be less resistant to punctures than rigid bottles.

What Size Water Bottle Do You Need?

Water bottle capacity is one of the most important considerations.

Common sizes include:

• 350–500ml: Compact bottles for short outings, children or supplementary drinks.
• 600–750ml: Popular sizes for everyday use and shorter walks.
• 800ml–1 litre: Versatile options for day hiking and outdoor activities.
• Over 1 litre: Useful when you need to carry larger quantities of water between refill points.

The right capacity depends on the duration and difficulty of your activity, the weather, your personal needs and whether safe drinking water will be available along the route.

A one-litre bottle doesn't necessarily mean one litre is enough for your entire walk.

For longer hikes, you may need to carry several bottles or combine a drinking bottle with an additional water container.

How Much Does a Full Water Bottle Weigh?

Water is surprisingly heavy when carried over long distances.

One litre of water weighs approximately one kilogram, before accounting for the weight of the bottle itself.

For example:

• 500ml of water weighs approximately 500g.
• 750ml of water weighs approximately 750g.
• 1 litre of water weighs approximately 1kg.
• 2 litres of water weighs approximately 2kg.

For backpacking, the weight of your water supply can represent a significant proportion of your total pack weight.

However, carrying sufficient safe drinking water should take priority over reducing weight unnecessarily.

Plan your route, consider available refill opportunities and allow for delays or changing conditions.

Wide-Mouth vs Narrow-Mouth Water Bottles

The opening of a water bottle affects how easy it is to drink from, refill and clean.

Wide-Mouth Bottles

Wide-mouth bottles have a relatively large opening.

They are useful because:

• They are generally easier to fill.
• Ice cubes can often be added more easily.
• The interior may be easier to clean.
• Some are compatible with water treatment or filtration accessories.

However, drinking directly from a wide opening can be less convenient when walking or travelling.

Narrow-Mouth Bottles

Narrow-mouth bottles have a smaller drinking opening, which can make it easier to control the flow of water.

They can be particularly practical for everyday drinking and walking.

The main disadvantage is that the smaller opening may make cleaning and drying more difficult.

Which Water Bottle Lid Is Best?

The lid can make a significant difference to how convenient a bottle is to use.

Screw Caps

Screw caps are simple, widely available and often provide a secure seal when fitted correctly.

They are a good option for general hiking and backpacking, although they usually require two hands to open comfortably.

Sports Caps

Sports caps allow you to drink through a smaller opening, often without removing the entire lid.

They are convenient for walking, cycling and everyday activities.

However, sports caps may contain additional components that require regular cleaning.

Straw Lids

Straw lids can make drinking easier without tipping the bottle.

They are popular for everyday use, although the straw and internal components need to be cleaned thoroughly.

Flip-Top Lids

Flip-top lids offer convenient access to your drink and may be easier to operate while on the move.

Check that the closure is secure and suitable for carrying inside a rucksack.

Klean Kanteen offers different cap styles for compatible bottles, allowing users to choose a drinking arrangement that suits their needs.

Should You Choose an Insulated or Non-Insulated Bottle?

Both designs have advantages.

Choose an Insulated Bottle If:

• You want cold drinks to stay cool for longer.
• You regularly carry hot drinks.
• You use your bottle for commuting as well as outdoor activities.
• You don't mind carrying some additional weight.

Choose a Non-Insulated Bottle If:

• Keeping equipment weight low is a priority.
• You mainly carry drinking water at ambient temperature.
• You want a simpler and often less expensive bottle.
• You prefer a compact design for backpacking.

For long-distance hiking, a lightweight non-insulated bottle may be more practical. For winter walks or everyday use, an insulated bottle can offer additional comfort.

Are Metal Water Bottles Better Than Plastic?

Neither material is automatically better for every activity.

Stainless steel is generally durable and well suited to repeated use. Plastic is often lighter and may be more practical when pack weight matters.

Consider how frequently you use your bottle and whether you prioritise durability, weight, insulation or cost.

A good-quality reusable bottle that you use for many years is generally preferable to repeatedly replacing poorly made bottles.

Choosing a Water Bottle for Different Outdoor Activities

Day Hiking

For a typical day hike, a lightweight bottle with a secure lid and sufficient capacity is a practical starting point.

Choose a size that fits your rucksack and is easy to access when walking.

If you expect to need more water than one bottle can hold, carry additional capacity rather than relying on an uncertain refill point.

Multi-Day Backpacking

For backpacking, weight, durability and packability become particularly important.

Lightweight plastic bottles and collapsible containers can be useful, especially when you need to adjust how much water you carry between refill points.

Plan where you can obtain safe drinking water and carry suitable treatment equipment if your route requires it.

Family Camping

For family camping, durability and ease of cleaning are often more important than saving every gram.

Reusable stainless steel or plastic bottles are practical choices, while larger water containers can provide additional water for the campsite.

Different coloured bottles can also help family members identify their own drinks.

Walking in Hot Weather

During hot weather, your water needs may increase, particularly during strenuous activity.

An insulated bottle can help keep drinking water cooler, but its additional weight may be a consideration.

Make sure you carry enough water for the conditions and don't rely on finding a shop or refill point unless you've confirmed it will be available.

Winter Walking

During cold-weather walks, an insulated bottle can help slow down cooling or freezing of its contents.

It can also be useful for carrying a warm drink, provided the bottle and cap are designed for hot liquids.

Always check the manufacturer's instructions before filling a bottle with hot drinks.

Children's Outdoor Activities

For children, choose a bottle that is comfortable to hold, straightforward to open and appropriately sized.

A secure, easy-to-use drinking cap can encourage regular drinking during school trips, family walks and outdoor activities.

Browse our Hydration department to explore the children's bottle range alongside other drinking equipment.

Water Bottles vs Hydration Reservoirs

Hydration reservoirs, sometimes called hydration bladders, are flexible water containers designed to fit inside compatible rucksacks.

They usually connect to a drinking tube, allowing you to drink without removing the reservoir from your pack.

Advantages include:

• Convenient drinking while walking.
• Potentially larger carrying capacity.
• Water weight positioned inside the rucksack.

However, reservoirs can be more difficult to inspect, refill, clean and dry than standard bottles.

Water bottles remain popular because they are simple, durable and easy to monitor.

Some walkers use both systems, carrying a hydration reservoir for regular drinking and a bottle as a backup.

Can You Fill a Water Bottle from a Stream?

Water from streams, rivers and lakes may contain harmful microorganisms or other contaminants, even when it looks clear.

Never assume natural water is safe to drink without appropriate assessment and treatment.

Depending on the circumstances, suitable filtration, chemical treatment, boiling or a combination of methods may be necessary. Not every treatment method removes every type of contaminant.

If you're planning to refill from natural water sources, research your route and choose appropriate treatment equipment before setting off.

For more information, visit our Water Purification department.

How to Clean a Reusable Water Bottle

Regular cleaning helps prevent unpleasant odours and the build-up of residue.

After use:

• Empty any remaining drink.
• Wash the bottle using warm water and suitable washing-up liquid.
• Use a bottle brush where necessary.
• Clean the lid, seals, drinking spout and any straw components.
• Rinse thoroughly.
• Allow the bottle and components to dry completely before storage.

Follow the manufacturer's instructions regarding dishwasher use. Some bottles, caps and insulated designs require hand washing.

Pay particular attention to sports caps and straw lids, where residue can accumulate in small openings.

How Often Should You Replace a Water Bottle?

There is no fixed replacement interval for every reusable water bottle.

A well-maintained bottle may last for many years, but it should be inspected regularly for damage.

Consider replacing a bottle or its affected components if you notice:

• Cracks or significant damage.
• Persistent leaks.
• Damaged seals or drinking components.
• Corrosion or deterioration.
• Areas that cannot be cleaned effectively.

Replacement caps and seals may be available for some bottle designs, allowing you to extend the useful life of the bottle.

Water Bottles Available at Sub Zero

Sub Zero stocks reusable drinking bottles and hydration equipment for walking, hiking, camping, travelling and everyday use.

Stainless Steel Water Bottles

Durable reusable bottles suited to everyday activities and outdoor adventures, including options from Klean Kanteen.

Reusable Plastic Water Bottles

Lightweight designs that are particularly practical when you want to minimise the weight of your equipment.

Children's Water Bottles

Smaller bottles and child-friendly designs for family walks, school trips and everyday use.

Water Carriers and Containers

Additional water storage options for camping, travelling and trips where greater carrying capacity is required.

Vacuum Flasks

Insulated containers designed to keep drinks hot or cold for longer, particularly useful for winter walking, camping and travelling.

Browse our Hydration department to explore the full range.

Frequently Asked Questions About Hiking Water Bottles

What Size Water Bottle Is Best for Hiking?

A bottle around 750ml to 1 litre is a versatile option for many walks, but the total water you need depends on the route, weather, duration and availability of safe refills. You may need to carry more than one bottle.

Are Stainless Steel Water Bottles Good for Hiking?

Yes. Stainless steel bottles are durable and suitable for outdoor use, although they are often heavier than plastic alternatives.

Are Plastic Water Bottles Safe to Reuse?

Reusable plastic bottles designed for food and drink use can be used repeatedly when maintained according to the manufacturer's instructions. Replace bottles that become damaged or cannot be cleaned properly.

Do Insulated Water Bottles Keep Drinks Cold?

Yes. Vacuum-insulated bottles slow heat transfer, helping cold drinks remain cool for longer. Performance varies according to the bottle, ambient temperature and how frequently it is opened.

Can I Put Hot Drinks in Any Water Bottle?

No. Only use hot liquids in bottles specifically approved for them. Some plastic bottles, drinking straws and sports caps are unsuitable for hot drinks.

Are Collapsible Water Bottles Worth Buying?

They can be useful for backpacking and travel because they take up less space when empty. However, they may be less convenient to clean and use than rigid bottles.

Should I Carry More Than One Water Bottle?

Carrying two bottles can provide flexibility, particularly on longer walks. It allows you to divide your water supply and may offer some backup if one container leaks or becomes damaged.

Final Advice on Choosing a Water Bottle

The best water bottle for hiking and camping is one that suits your activities, carries enough water and is comfortable to use.

For lightweight hiking, a reusable plastic bottle may be the most practical choice. For everyday durability, stainless steel is a strong option. If temperature retention matters, consider a vacuum-insulated design, while collapsible bottles can be useful when storage space is limited.

Whatever you choose, make sure your bottle is easy to clean, has a secure lid and provides enough capacity for your planned activities.

Explore our Hydration department for water bottles, children's drinking bottles, water carriers and vacuum flasks designed for outdoor adventures.