Every year I struggle with this school supply: the water bottle. Some teachers want sport-top, some don't care, some sport tops my kids can't even get open without using their molars to pop the thingy up. A couple of weeks ago, we were at REI and I found these:
CamelBak Water Bottle - 25 oz.
*CamelBak® convenience comes to popular water bottles for the benefit of anyone in need of quick hydration.
*Durable Lexan® polycarbonate construction now benefits from easy-to-use, no-drip bite valve system; simply flip up the valve, bite and drink
*Wide-mouth bottle fills easily and holds 25 fl. oz.; dishwasher safe in the top rack
*Standard cap size fits most wide-mouth bottles; bottle fits many water filters
*Easily attached to a pack or belt using a small, lightweight carabiner; handles warm liquids as easily as cold
*Lists approximate volumes in ounces and milliliters
Did you see that part about the "bite-valve"? It's awesome. The kids just bite on the blue part and the slit opens up; then it works just like a regular straw. As soon as they release their bite, the slit closes again and prevents leaks. It's polycarbonate, so it doesn't absorb odors and make the water taste funny. Holly Grace (a.k.a. the "midnight waker") likes to keep one on her nightstand and sometimes sleeps with it in the bed with her. It never leaks. And that blue thingy can be replaced if need be.