When I was a kid there was a Pop Shoppe store by my house that sold different flavors of soda pop in thick little glass bottles. You'd grab a crate, fill it up with whatever mix of flavors struck your fancy, and pay a deposit for the bottles. When you'd drank them all you brought your crate of empty bottles back for a refill.

Seemed like a pretty good idea to me. It went out of business, though, I think because people wanted Pepsi and Coke brands.