This bottle opener should fit on every plastic bottle with a cap diameter of <30mm like water bottles, Coca Cola bottles, etc.

Originally I created this for my grandma who has trouble opening water bottles by hand and struggles with regular openers. With this opener she can finally open bottles by herself again.

I hope that especially people who have the same struggle, can make their life at least a little bit easier with this opener!

What you additionally need:

Steel File

2x 20mm M3 Screws 

2x M3 Nuts

A M3 x 15mm screw for mounting the attachment would be fine too. You need to shorten it anyway for the ideal fit, so it doesn't really matter.

Make sure that you sharpen the other screw, with a file like it is shown in the pictures. It acts as tooth for the bottle cap and it may not work properly otherwise. A too long screw also has a negative effect on the functionality, so if it doesn't work well for you, try to shorten the screw a little bit more.

For the handle is no additional support needed. You can remove my custom support with a screwdriver or knife afterwards.