Just got these puppies in today. Often times, small frames and kids' bikes don't have enough space in the front triangle for water bottles, so the handlebar is the better option—it also makes it easier to access. Imagine my thumb is a handlebar: 

Also imagine that my camera focuses well while I shake:

We've got two versions, one for 22.2–25.4mm diameter bars (WC0900) and another for larger 25.4–31.8mm bars (WC0901). They're in stock and available for purchase through our baby-momma and exclusive distributor, QBP. They'll be active in our online store tomorrow.