Give your beloved Stanley cup (or Yeti or Hydro Flask) some personality and protection with this Velaco Initial Letter Silicone Boot! Choose your initial, and boom – your tumbler is instantly personalized, so no more mix-ups at the office or gym. This boot is made from food-grade, BPA-free silicone that's durable, flexible, and easy to clean (dishwasher safe!). It's designed to fit the bottom of most popular tumblers: Stanley Quencher H2.0 in 40, 30, 20 oz, IceFlow Flip 30/20 oz, Yeti Rambler 20 oz, and Hydro Flask 12-24 oz (fits diameters from about 2.8\ to 3.1\). But it's not just cute – it's practical! The boot adds a grippy, anti-slip base to prevent annoying tumbler tips and slides on smooth surfaces. It also protects your cup's finish from scratches, dents, and table rings. Adds a bit of noise reduction too. It's airtight and great for indoor/outdoor use. A simple, affordable upgrade that makes your drinkware uniquely yours and keeps it in mint condition. A must-have accessory for any Stanley fan!