Friendly reminder: 1. The silicone boot is suitable for the Hydro Flask wide mouth water bottle。12oz~24oz---diameter 7.5cm；32oz~40oz---diameter 9.0cm 2. If your bottle isn't Hydro Flask wide mouth water bottle,Before you place an order, please measure the bottom diameter of your bottle and choose the correct Variation. BOTTLE ONLY FOR PHOTO REFERENCE AND IS NOT INCLUDED Compatible with Hydroflask, Kleen Kanteen, Aquaflask, Kool, Hydr8. For best fit, measure the bottom diameter of your bottle with a ruler to see what boot size fits. It will fit if your bottle is the same diameter or slightly larger. Buyers are responsible for any return shipping fees. Protect your bottles against dents and scratches with our silicone boots. Silicone sleeve offers additional grip on different surfaces, keeping your bottle secure. Combine silicone boot with your favorite flask for unlimited color combinations. The bottle is for reference only, not included Measure the bottom diameter of the bottle to see the correct protective sleeve size. The buyer is responsible for any return shipping costs. Use our silicone boots to protect your bottles from dents and scratches. The silicone sleeve can provide extra grip on different surfaces to ensure your bottle is safe. Combine the silicone sleeve with your favorite flask to get unlimited color combinations. Friendly reminder: 1. The silicone boot is suitable for the Hydro Flask wide mouth water bottle。12oz~24oz---diameter 7.5cm；32oz~40oz---diameter 9.0cm 2. If your bottle isn't Hydro Flask wide mouth water bottle,Before you place an order, please measure the bottom diameter of your bottle and choose the correct Variation. Selection of color -black -white -gray -Olive green -Cobalt blue -red -blue-green -powder -yellow -purple -orange -green