Bob Strollers There are certain laws of going out with a baby. One of those is you never know when your baby will be going, hence, the BOB Stroller Diaper Bag. It clips directly to any BOB single and Duallie stroller, so everything you need to clean and change your baby is right there with you, not back home or in the car. With its waterproof, stinkproof changing pad, shoulder strap, insulated bottle pocket, and much more, both baby and you will be a lot happier.