​The Milton Elfin Thermosteel Bottle is a compact, 160ml capacity, double-walled vacuum-insulated flask designed to keep beverages hot or cold for extended periods. Its inner copper coating enhances temperature retention, ensuring your drinks maintain their desired temperature. Crafted from high-quality, food-grade, BPA-free 304 stainless steel, this bottle is durable, unbreakable, and rust-proof. Its sleek design fits comfortably in most cup holders and is ideal for carrying to the office, gym, or while traveling.