I also hate the permanent sippy cup attachment thing and as usual I've learnt the hard way with my other kids! I don't want anyone to be dehydrated and we should all drink more water but... 1) It doesn't teach them to drink properly out of a cup 2) I think the spouts are unhygienic and difficult to clean 3) unless they are drinking tap water, they are very bad for teeth 4) like dummies it's another think to lose and for them to get agitated about 5) I don't think it's a good idea to drink on the move - my dd is 8 now and has started to do it with a sports bottle in a pseudo-celeb manner - fine if it's very hot but something about it really annoys me 6) If they are constantly drinking it spoils their appetite for food 7) If they are constantly drinking it's really hard for them to hold their bladder and toilet train them later. Gosh, I'm stroppy this morning!