Stanley Cup Silicone Sleeve 20-40OZ: Enhance and protect your Stanley cup with our vibrant, transparent silicone sleeves. Designed to fit 20OZ, 30OZ, and 40OZ Stanley tumblers and IceFlow flip straw bottles, these sleeves snugly encase the base, preventing scratches, dents, and noise. Compatible with Hydro Flask (12-24 oz) and Yeti (20-30-35 oz) models too.