Give your favorite bottles an extra dose of durability with this silicone boot, designed to add grip and protect against minor dings and dents. Not only does this accessory keep waste out of landfills, but for every boot sold MiiR gives at least 1% of revenue to nonprofit organizations whose work empowers communities while benefiting the health of their natural environments. This silicone boot is sized to fit the MiiR Vaccuum Insulated Sandstone Bottle (1535123). Hand wash recommended.