Water bottles in exam?

random question, but would a coloured (but transparent) water bottle be allowed in an A level (or GCSE) exam? they usually say clear so does that mean 'white' cos my bottle is transparent but it's green. I'm guessing it's probably better to just take a normal disposable bottle, but if I can, I would rather take this one. thanks!

They haven't been allowed at my schools so I would say no. It makes no sense but better to bring a regular colourless disposable on than risk it getting confiscated (especially in a long exam!)

but bottle has small blue cap, but whole body is transparent.It's buy and throw bottle with label removed, so what about blue cap?

I brought a disposable water bottle with a coloured cap, and it wasn't an issue. You should be fine.

Like the person above said, you are not allowed a coloured, clear water bottle, or a bottle containing any drink that is not water. I don't understand the reason why, but also coloured pencil cases aren't allowed.
You can just use a clear plastic bottle, or a normal clear bottle but make sure to remove any labels!