All primus fuel bottles now come with a childproof
cap. The diagram at left shows how the cap works.
To Close:1. Push down cap. 2.
To Open: 1. Push down
cap. 2. Twist counter-clockwise
Optimus Fuel Bottle
0.4 L Bottle
0.6 L Bottle
1.0 L Bottle
Note: above photos are of the original
cap which is rounded at the top. The child proof cap is sqaured at
top as pictured in the image at the top of this page. The fuel bottles
themselves are the same as pictured above.