Superior quality
 HYDY thermos series are subjected to a rigorous quality control in the production line under the safety standards of the Swiss company SGS. It is made of special kitchen stainless steel 18/8 (304), without BPA or other chemicals or substances harmful to health. It is easy to clean and resistant to corrosion, allowing you to drink your beverages without any worries.
 Excellent thermo insulating effect
 Whether you're in the office or enjoying the outdoors on a sunny day, the double-layer stainless steel thermos glasses are designed to preserve heat and cold for hours. No matter where you are, you can enjoy your hot or cold drinks.
 Double exterior protection
 Special kitchen sislicone is used in the outer layer. It is non-toxic silicon, free of plastic and 100% recyclable. The design mimics the precious Macaroon pains and patterns, and is slip-resistant and non-drip, allowing you to easily carry it without accidental spills. Nor does it scratch furniture surfaces or suffer condensation on the outside of the glass.
 * Before the test, the thermos bottle is preheated for 1 - 2 minutes with hot water, then, the thermos bottle is turned upside down at room temperature of 25 Cº +/- 2 Cº, then hot water is added and the temperature of this drop to 95 Cº +/- 1Cº, or cold water is added and the temperature is allowed to rise to 0 Cº +/- 1 Cº. Then the test begins. After 6 hours, the temperature is measured at the bottom of the bottle.