Thickened Material - Our protective cover is made of food-grade silicone, soft and flexible. 2MM thickened quality makes it more sturdy and long-lasting, reusable, BPA FREE and safe for children.Size Reference - The anti-slip boot is 2.85" in diameter, 1.7" in height. It is fit for water bottles or tumblers' bases with diameter of 2.8-2.95". Please measure the diameter of your bottle's bottom before ordering if not sure fits or not.Perfectly Match - This silicone cover is perfectly fit for the Stanley Neon Quencher tumbler 20/30/40oz, Stanley IceFlow 20/30 oz, and also compatible with Hydro Flask Standard Mouth 18/21/24 oz, Wide Mouth 12/16/18/20/24 oz, and Simple Modern Tumbler 20/24/28/40 oz, Simple Modern Summit 14/18/22 oz, Simple Modern Ascent 17/20/24oz, Owala Tumbler 40 oz, Owala Freesip 18/24oz, Yeti Rambler 20/30 oz, and more other tumblers & water bottles with diameter of 2.8-2.95" base.Extra Protection - Designed to protect the bottom of water bottle or tumbler from damage and scratches, the neon sleeve offers strong protection, ensure lasting durability and pristine condition. Provide stable grip and reduce noise when placing the tumbler on the table.NEON Options - There are several colors we currently provide to choose, like electric pink, neon green, neon black(black will be back soon), neon yellow, neon orange, neon purple, neon blue, and neon red.