Amazon has some great deals on these Contigo
Water bottles. Great for back to school!
A few examples
Contigo Auto Seal Courtney Kids & Tweens Water Bottle, 20 oz, Sangria
For $7.59!
Contigo AUTOSEAL Trekker Reusable Kids Water Bottle, 14oz, Navy and Nectarine, 2-Pack
For $9.99!