Thirty-One Bag Cinch Thermal in backpack Watermelon | eBay。The THIRTY ONE Thermal Cinch Sac Drawstring Backpack in Watermelon Stripe is a stylish and practical bag perfect for travel and casual occasions. Featuring a striped exterior with a watermelon character, this medium/large size backpack has a drawstring closure and white handle/strap color. The insulated design, along with a PVC lining, makes it ideal for carrying snacks or drinks while on the go. With a durable polyester exterior, this backpack is both fashionable and functional, offering convenient pockets and a unique picnic-themed design. LL10 MSRP$56 18\"x14\" 1\"