【Excellent Protection】Still worried about broken, scratched bottoms of your favorite stainless steel water bottles? Or embarrassed by the clinking sound the bottle makes on the table? This silicone sleeve for Stanley can effectively protect the bottom of the bottle from depression, scratch, skid resistance and noise. 【Perfect Compatiblity】The silicone boot is suitable for 40oz 30oz 20oz Tumblers. It is precisely made according to the size of the original cups, which perfectly fits the cup bottom and won't fall off easily. 【Safe Material】Made of soft and stretchy silicone rubber, these silicone protector boots are BPA-free, food grade, without odor, reusable and durable. It could be daily used for Stanley's mug in peace of mind. Safe for all ages and dishwasher safe. 【Customize Your Bottles】You can choose the same color with your bottle or different ones to create your own scheme the way you want it. Mix and match to customize your colorful look to make your tumbler more unique and creative. 【Easy To Install】Before installation, please clean the bottom of the tumbler with a wet cloth and let them dry. Then slowly put the bottom sleeve cover on the bottle and squeeze out the air. Package of two, please buy with confidence, we are committed to providing 100% customer satisfaction, please do not hesitate to contact us if you have any questions.