Primus Replacement Fuel Bottle Caps are ideal for making your Primus fuel bottles tamper proof to small hands. 

Manufactured from HDPE plastic with a long thread and thick silicon O ring, these caps will fit all past and present Primus fuel bottles. When screwed on, the cap just rotates in both directions without affecting the seal . To remove, you just need to apply downward pressure whilst twisting it anti-clockwise.