Protect your favorite tumblers from dents, scratches, and loud clanking with these Silicone Boots! This 4-pack comes in fun colors: Red, Yellow, Malachite Green, and Blue Lagoon. Each boot is made from soft, BPA-free silicone that stretches to fit the bottom of most popular tumblers with a base diameter of about 2.85-2.95 inches. They're designed for Stanley Quencher 30oz/40oz, Stanley IceFlow 20oz/30oz, Owala 40oz, Yeti Rambler 20oz/30oz, Simple Modern, and similar wide-mouth bottles. The boot is about 2.9 inches in diameter and 1.7 inches tall. It provides a non-slip grip on surfaces, reduces noise, and helps prevent damage to your cup and your furniture. Easy to put on, easy to clean, and reusable. A must-have accessory for keeping your drinkware looking new, whether you're at home, in the car, at the gym, or the office. Measure your bottle's bottom before ordering to ensure a snug fit!