Your drink can be enjoyed anywhere and at any time. The Qwetch thermos bottle keeps your drink warm for 12 hours and cold for 24 hours. It’s the perfect solution for enjoying your hot or cold beverage on the go or at home. The Qwetch thermos bottle is therefore a great alternative to plastic bottles. Double-walled: both the inner and outer walls are made of stainless steel 304 (18/8). The inside of the lid is made of stainless steel 304 (18/8). The inner wall is uncoated and unpainted (unlike aluminum containers). It does not alter the taste or aroma.