I was not sure whether to buy this after reading the other reviews but it seems that i should not have worried. You CAN open the bottle and empty it quite easily. Easy to wash. My only complaint is the lack of choice in colour.
the cap at the top has a plastic lock which m worried may break soon. and it has to be pressed really hard to close(lock). also you cant empty the bottle , some water stays inside and doesnt come out aand naturally u cant open the bottle. i was also surprised as soon as the bottle came i called flipcrt to replace it but they simply dont.