For a couple of months after our son was born I had a messy cup cabinet. There were so many bottles, liners, nipples, rings, etc… floating around on the shelf it drove me nuts. One day we bought a pack of diapers and it came with a refillable wipe container. We already had one in the nursery so I was going to throw it away. Instead, I filled it up with all the bottle and cup accessories, closed the lid and put it in the cup cabinet on the same shelf as all of our bottles and toddler cups. It keeps the shelf neat and I can always find the right pieces!
More: Hacks for the kitchen