1.Shining Diamond: Our protective cover is made of premium silicone, and surrounded by bright diamonds with an air outlet in the bottom. 2MM thickened quality makes it more sturdy and long-lasting, reusable, BPA FREE. Gorgeous diamonds make your cup more attractive and catch all the attention around 2.Perfectly Match: This silicone boot is made for Stanley Quencher tumbler 40/30/20 oz, and Stanley IceFlow 30/20 oz. It is also compatible with HydroJug Traveler 40/32 oz, and for Hydro Flask Standard Mouth 24/21/18 oz, Wide Mouth 24/20/18/16/12 oz, and for Simple Modern Tumbler 40/28/24/20 oz, Summit 22/18/14 oz, Ascent 24/20/17 oz, for Owala Tumbler 40 oz, for Yeti Rambler 30/20 oz, and for more other tumblers & water bottles with diameter of 2.8-3' base 3.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 2.8-3'. Please measure the diameter of your bottle's bottom before if not sure fits or not 4.Extra Protection: Designed to protect the bottom of water bottle or tumbler from damage and scratches, the protective sleeve strong protection, ensuring lasting durability and pristine condition. Provide a stable grip and reduce noise when placing the tumbler on the table.