Summit Silicone Boot - Fits 64oz and 84oz Bottle Sizes - Large 3XRD

Maximum Protection: This silicone boot is the best way to prevent dents, scratches and other imperfections on the bottom of your bottle, and is perfect for kids and adults alike.
Customize Your Bottle: The Simple Modern Boot is the perfect way to accessorize your bottle. Pick a color that matches your bottle or create a unique look that expresses who you are!

ref 3XRD