I voted "Dont Care"
But I guess it bugs me when it isn't the kids choice to be using a sippy.
Like the situation a PP mentioned w/ her SIL insisting on 8 year olds use sippys.
That is not very respectful of the kids, IMO
I don't personally like sippys (for us) because I feel like they were really hard to get clean. And I was always freaked out when DS would drink out of a sippy at someone else's house BC I have seen the way most people just throw them in the dishwasher w/out taking them all the way apart. But I am really anal about dishes being clean etc so this is just one of my things in general.
DS has been using regualr cups for a long time now. I have been lucky, he really isn't a dumper, and he is an only so far (not much longer!!) so there is no one else to come along and dump it.
I think the difference between a sippy and other types of bottles with lids is that the sippys are anti leak and have that vacuum thing going on that prevents them from spilling. They also cause tooth decay and are difficult to get a big swallow out of. You really have to work to get a beverage out of a sippy cup. DS's Sigg just has a lid on it that comes off. Totally different from using a spout that you have to suck on like a bottle.
Cups with lids, straws or sports bottles are completely different from a sippy. The only thing they have in common is that they are closed containers that are easily portable.
I am surprised to see so many people comparing sippys with drinking from a water bottle.