Sea To Summit Collapsible X Mugs are an ideal weight and space saving drinking vessel for adventure travellers and lightweight backpackers.

Manufactured from food grade BPA free heat resistant silicone, these mugs walls have a concertinaed design that allows them to fold flat when not in use to a disc that has a depth of only 15mm.

When extended, the durable Nylon 66 rim provides extra support to prevent the opening from collapsing, allowing you to drink hot and cold drinks safely. On the inner walls there are calibrated imperial and metric measuring marks enabling the mug to be used as a measuring cup.

With a holding capacity of 480ml, these X Mugs are one of the largest collapsible mugs available on the market.