Pretty fun! I figured it out pretty quick. Maybe there should be a bonus for depositing the max amount of bottles at once?
I have to concur that they look more like chicken drumsticks than water sacks, but I was willing to suspend my belief xD
Also, occasionally the collision will take several attempts on a water bottle (mostly from the top of them). I think it might be right after I deposit the bottles, maybe the variables makes it think I'm still full for awhile?