Love your Stanley cup but want to keep it in top shape? This 8-piece accessory set has everything you need. It includes 2 straw cover caps (fits 9-10mm straws), 4 silicone spill-proof toppers (2 square for the straw hole, 2 round for the lid), and 2 silicone boots to protect the bottom. Perfect for Stanley Adventure Quencher 40 oz and IceFlow 20 oz & 30 oz tumblers. The silicone is food-grade, BPA-free, stretchy, and dishwasher safe. The boots prevent scratches, dents, and reduce noise when you set the cup down. The straw caps keep dust and germs out when you're not sipping. The toppers create a tight seal to prevent leaks and help maintain your drink's temperature longer. It's all about customizing and protecting your favorite tumbler. Whether you're tossing it in a bag, taking it on adventures, or just using it at the office, these accessories add functionality and longevity. Easy to put on, easy to clean. If you're a Stanley fan, this set is a no-brainer upgrade.