Insulated/Cooling Water Bottle Set for Kids with Handle - Thermos I recently purchased this online, but my child doesn't like the design and probably won't use it, so I'd be happy if someone else could! ☺︎ It's a stainless steel type that keeps things cold and hot ☆ I will wrap the product in bubble wrap and ship it so the contents are not visible ☆ Please understand that this is a simple packaging ☆ ☆ Here is the product information that was on the website where I purchased it ⇩⇩ Size: 17 x 8cm (bottle) Capacity: 360mL Body (inside): Stainless steel Body (outside): Stainless steel (acrylic resin coating), polypropylene Lid: Polypropylene Lid switch: Polyacetal Packing: Silicone Heat retention effect: (6 hours): 50 degrees Celsius or higher, Cold retention effect (6 hours): 15 degrees Celsius or lower. Ultra-lightweight and compact type. The double-walled vacuum structure keeps cold and hot effects for a long time.