I was grocery shopping when I spotted these bottles, and on impulse bought 3 of them. They have gone to school every day since then, and not a drop has been spilled. They go through the dishwasher every night and come out clean, no funky smell, even after having milk in them all day. I like that they only have 2 parts - nothing to get lost, and no straws or hinges, or what have you that feel like they never get completely clean. I logged on today to see if they were sold in a smaller size, because they are somewhat large for going to school, half the size would be perfect. I'd stock up on 6 of them and just rotate them to school and in the dishwasher and never buy another juice box again. Buy this bottle, you won't regret it.!