Fits a 32oz water bottle!!
I couldn't find this info anywhere so I wanna post it here in case anyone is wondering: this mini backpack fits a big nalgene water bottle in it.
I've been looking for a quality mini backpack to hold my water bottle and maybe just a couple other things and I'm really surprised to find that this bag could fit two 32oz bottles and still have a bit of room in the front pocket. I got this during the black friday sale, but this is still very much worth the full price. I couldn't be happier with it.