A Must Have for Your Bottles -- Avoid unwanted scratches, dings, or dents with this extra layer of protection during outdoor or indoor adventures, extend the life of your bottle. Perfect for all sports and outdoor activities. Perfect Fit -- Our Silicone boot is designed to fit perfectly for Owala FreeSip, Twist, and Flip stainless steel water bottles. It's precisely made to fit the cup bottom and won't fall off easily. Gift Ideal -- You'll receive two pieces of silicone boots, one for yourself and one for family, friends, or as a spare. Protect your water bottles at school, outdoors, fitness, home, office, or anywhere else. Top Quality -- Premium food grade silicone rubber that is more stretchy and durable, Anti-Slip, BPA-Free, and Safe for all ages. Guarantee -- If there is any problem with our product, do not hesitate to contact us as soon as possible. We will do our best to satisfy you.