I've said it before and I'll say it again, I LOVE HOBBY LOBBY!
During another one of my routine trips there I found these awesome little water bottles for $0.60 each (reg. $0.99 each)! I bought these a few years ago for each of the students in my class and it ended up being a great purchase. They carry them in the spring and summer with their VBS supplies, but the last two years I've hit them up too late and there weren't enough to purchase a class set. I don't know about you, but I have always let my students keep water bottles at their desks and these little ones are just perfect. I let my students fill them up in the morning (and usually after lunch during the really really hot days) and they're responsible to take them home and wash them. It really eliminates the distruption of kids getting up and leaving the room for drinks and they really aren't a distraction to have on desks. Once I get my class list I will do some Sharpie decorating with the kids' names. Overall, the kids are usually good about taking care of them and for being so cheap these things really hold up well with the third grade wear and tear.