Thirty-One Stroller Thermal Bag. Can attach to a Stroller like a Stroller caddy (fit our Double BOB stroller) or can attach to a walker, scooter. Also has the ability to be carried like a regular bag. Inside of the bag is thermal like a cooler. Great if you need to keep medicine or drinks/formula chilled. Outside is personalized “Park Bag” as we used on our trip to the Disney Parks. Used a few times but still in great shape. Any questions just ask! ❤️🖤