This Diamond Tumbler Sleeve is the perfect accessory for your Stanley or any 40 oz tumbler. Designed to fit snugly over your tumbler, this sleeve is made of high-quality silicone and decorated with glitter to add a touch of sparkle to your beverage holder. The sleeve is also insulated to keep your hot or cold beverages at the perfect temperature for longer periods of time. The diamond design on the sleeve makes it a great addition to any sports-themed collection. This tumbler sleeve can be used in the kitchen, at home, or on the go, making it a versatile and useful item to have. It's a great gift for teens, adults, and girls who love to accessorize their drinkware.