Removable, silicone boot BPA-free Dishwasher safe Make your Hydro Flask your own with a colorful, durable, silicone bottle boot that protects against bumps and dings. The medium size fits Hydro Flask 32oz and 40oz wide mouth bottles and the small fits Hydro Flask 12-24oz wide and standard mouth bottles.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }