Our No-Slip Tumbler Boot is the perfect addition to your tumbler. Made from soft, durable silicone material, our boot will fit securely to the bottom of 20 and 40 oz tumblers. Experience a quiet, soft landing when you set your tumbler down, thanks to the boot's secure grip - giving you peace of mind that your tumbler is protected from unwanted dents or dings. Complete the set with our tumbler fanny pack for stylish, safe storage