Alpine Thermo Bottle (Stainless Steel Water Bottle) I used this 4-5 times to hold hot water for my child's milk when going out. The water temperature hardly dropped even after 6-7 hours, which was very good. The packing shows no signs of deterioration, but please purchase only if you understand that it is not new. Features This is a lightweight and compact thermo bottle developed for mountaineering, which demonstrates excellent heat retention even in extremely cold environments. The outer body uses strong SUS304 stainless steel, and the inner body uses SUS316 stainless steel, which boasts excellent corrosion resistance. It has specifications that are easy to handle even when wearing gloves, such as a silicone rubber non-slip and an inner stopper that can be opened and closed with a half turn. By replacing the cap with an optional Actybrid (sold separately), you can convert it to a direct-drinking type that allows for quick hydration. Product Specifications Specifications/Standards Heat resistance (℃): (Inner stopper) 100℃, (Outer stopper) 100℃, (Packing) 150℃ Cold resistance (℃): (Inner stopper) -20℃, (Outer stopper) -20℃, (Packing) -40℃ Color: Dark Gray Capacity (L): 0.5 Width (mm): 70 Depth (mm): 70 Height (mm): 240 Material Body: (Outer) SUS304 stainless steel, (Inner) SUS316 stainless steel Outer stopper: Polypropylene Bottom cover: Silicone Cup cover: Silicone ● Inner stopper: Polypropylene ● Packing: Silicone Mass/Mass Unit 265g I have disposed of the box, so I will wrap it thickly in packing material and send it in a cardboard box. Thank you for viewing.