Bottle Cap Lock

I designed this to stop my daughter drinking all the pop in the house. It should fit any standard 1 - 2L bottle of fizzy drink - Coke or similar

You will need a small padlock to lock it. The holes for the hinge are 2mm and i had to ream them out with a 2mm drill bit and then used some filament as the hinge pin, heated and squashed the ends with a pair of pliers to stop the filament falling out.

Obviously this could be just snapped off but my daughter wouldnt do that so works for us, and annoys her which is funny!