Durable water flask - Stainless steel interior and exterior with thermal coating Superior vacuum insulation for max temperature retention. Keeps temperature for up to 12 hours for hot coffee thermos or tea Portable design thermos with cup so that you can bring it anywhere - Camping, hiking, beach, schools, and etc. Scratch-resistant flask water bottles, easy to clean, and dishwasher safe Lid is made with high quality polypropylene and food grade silica gel seal to prevent leakage. Use the insulated water bottle to store cold or hot drinks Choose from our four vibrant color to match every lifestyle