I am ISO a small, messenger-style diaper bag that will hold 2 diapers, sippie cup, snacks, wipes, wallet and keys. I currently have the Skip Hop Duo, and LOVE IT, but am looking for something small/light to take to the grocery store/quick trips. Now that my DD is 15 months I don't need to bring everything and the kitchen sink with me when I run errands. It would be a bonus if it could clip on to the stroller as well. Any advice would be helpful. Thanks!