My girlfriend can't screw them back on properly so right now she only uses each drinks bottle once

I hate the things so much because they hurt to use, can't really be used one-handed and also make it difficult to drink from the bottle because of the weird angles they implicate.

So I've been cutting the caps off and cutting the little limbs off and making what was previously one piece of plastic into three, which I obviously also hate doing.

In the past I would always screw the lid back on before binning it, either to trap the air out or for the sake of completeness, so in my particular case this policy is very much the worst of all worlds, I hope the data shows that I'm an edge case though if they're passing it into law.