FITS PERFECTLY- Our silicone boot is designed to perfectly fit Stanley Adventure Quencher Travel Tumblers (20oz, 30oz, 40oz), Stanley H2.0 FlowState (30oz, 40 oz) with handle, Stanley IceFlow Tumblers (20oz, 30oz), Hydro Flask water bottles (24oz, 21oz, 20oz, 18oz, 16oz, 12oz), Hydro Flask 35/ 40 oz Travel Tumbler, and for Simple Modern 30/40 oz Tumbler, for Simple Modern 20/24/28 oz Classic & 14/18/ 22 oz Summit & 20/ 24 oz Ascent water bottle EXTENDED COMPATIBILITY- Our silicone boot is also compatible with other popular brands & sizes. It fits Owala 40oz stainless steel tumbler,YETI Rambler 20/ 30 oz Travel Mug & Tumbler, YETI Rambler 12/ 18/ 26 oz water bottle. Suitable for tumblers or water bottles with a base diameter of 2.8-3 inches（7.1-7.6cm) HIGH QUALITY MATERIAL - Made of food-grade silicone, soft and durable, more elastic, will not be deformed, BPA free, safe for children. Easy to use, easy to clean, reusable. It is safe to take it as a dog bowl on-the-go activities MAXIMUM PROTECTION - This durable bottom sleeve helps protect against dents, dings, and damage. Give your cup and tumbler a longer life. It's the perfect cup tumbler accessory for your active, on-the-go lifestyle BETTER SERVICE- Any questions, please contact us, we will reply within 10 minutes during working time Diamond Silicone Boot for Hydroflask Water Bottle