A stylish winter essential to keep soups， tea & coffee warm， or the ultimate summer essential to keep your drinks cool at the beach or rolling around in your car all day. If you're using it for tea or coffee， push the red button down on the inner lid and the liquid pours straight out in to the outer lid， which doubles as a cup. Drink straight from the bottle at your own peril - the contents will still be hot， while the outer is always cool to the touch. The single layer of stainless steel at the very top， where the lid screw in， can be hot to touch， so don't put your lips directly on it. For maximum insulation efficiency， preheat or prechill product just prior to use. Fill with hot/cold tap water， attach lid， let stand 5 to 10 minutes and empty. After filling， place the lid on the product to increase thermal efficiency.