Milton Active Stainless Steel Water Bottle | 1 PcSingle Wall Fridge Steel Bottle with inside outside stainless steel made of grade 304, which is rust free. This stainless steel bottle comes with a string to provide easy of carrying. This bottle is easy to clean and maintain, use a mild detergent or dish wash liquid and clean on the inside with a bottle brush. The unique shape of the bottle and leak proof technology makes the product suitable for comfortable drinking even during travel.