UPGRADE DIAMOND DESIGN - The new diamond design will add style to your water bottle. Our Silicone boot fits Hydro Flask Water Bottles 32 40 oz and Most Vacuum Sealed Water Bottles 32 40 oz wide mouth water bottles (Boot Size: 3.56inch bottom diameter, 1.89 inch high). Note: it is not compatible with 30-40oz Stanley flask with thinner bottom, pls do check the flask bottom diameter before ordering ENJOY BETTER SERVICE - If you have any question about the products, please don’t hesitate to contact us, We will reply and solve it for you in 24 hours（PLEASE CHECK THE SIZE BEFORE PURCHASING.） DIAMOND SILICONE BOOT SLEEVE - Please check the size of your bottle and the silicone boot carefully before purchasing. Our silicone boots are 3.54 inches in diameter and 1.97 inches high. Suitable for tumblers or water bottles with a base diameter of 3.5-3.6 inches MUCH EASY TO CLEAN - Safe for all ages and dishwasher safe. Provides protection from scratches, dents, and damage to the bottom of your Stanley cup or Stanley tumbler or other same bottom brand MAXIMUM PROTECTION FOR YOUR BOTTLE - This durable bottom sleeve helps protect against dents, dings, and damage. Give your cup and tumbler a longer life. It's the perfect Stanley cup tumbler accessory for your active, on-the-go lifestyle. Perfect for all sport and outdoor activities Diamond Silicone Boot for Hydroflask Water Bottle