I've got the 8 oz bottles on the 1.3 and 1.4 bins and it's got to be filled once or TWICE a day. BUT that link offers 8 oz, 16 oz and 32 oz, all really good prices. Thanks so much for posting the link!

16 oz bottles are impossible to find locally. It's 32 oz or 8 oz. I bought a bunch of 32 oz and THEN discovered they will NOT fit on the rack. There's not enough space between bin and frame for the bottles, and when full, they either fall off the rack entirely or the tube doesn't reach into the wire. *slaps forehead*

So I had to return all the 32 oz bottles to all the stores, then rush to buy 8 oz bottles are Walmart. I'll be ordering some of the 16 oz off that link. At $2.50 each, it's a bargain from my online searching.

Thanks to everyone making suggestions!!