Bügelflasche MKII (flip-top bottle cap)

You like flip-top bottles but don't want to take the beer bottles into office?
You don't want to buy blank bottles which have a flip-top but are not of same quality like those thick walled beer bottles and just don't feel right?
You like some club mate but are not happy with the screw on caps?
Then here is your solution: a flip-top screw on cap for e.g. club mate bottles.

I was using this adapter since about two months, but my own screw thread was not fitting properly so it was hard to han