Cheap Hydro Flask‘s insulated water bottles are made of premium food grade 18/8 stainless steel. The bottle has no padding (like most aluminum bottles) and does not contain BPA. Unlike plastic or single-wall stainless steel bottles, Hydro Flask can choose your beverage for hours at your preferred temperature, whether you choose high temperature, low temperature or room temperature liquid. All Hydro Flask products are backed by a lifetime warranty and are double wall vacuum insulated. Designed for light, long-distance travel, golf, camping or everyday office use. Even if it is filled with ice, your Hydro Flask sale will not leave water stains on your desk or leak in your bag and drip on your clothes.
Double vacuum insulated stainless steel kettle keeps the drink cold for 24 hours, hot for 6 hours
Premium grade 18/8 stainless steel, no bisphenol A
High quality colored matte finish, never leaking
Making tea with vacuum flask
Vacuum flasks are mostly insulated by airtightness. Due to the structure of the tea itself, it will be fermented in a closed state. The tea after fermentation will produce some harmful substances.
Tea is rich in protein, fat, sugar, vitamins and minerals. It is a natural health drink, which contains tea polyphenols, caffeine, tannins, tea pigments, etc., and has a variety of pharmacological effects. Tea leaves are soaked in high-temperature water for a long time, just like boiling on a hot fire. Tea polyphenols, tannins and other substances will be leached in a large amount, making the tea color thick and bitter.
Nutrients such as vitamin C are destroyed when the water temperature exceeds 80 ° C. Long-term high temperature soaking will cause excessive loss, thereby reducing the health function of the tea.
At the same time, due to the high water temperature, the aromatic oil in the tea will quickly evaporate a lot, and the tannic acid and theophylline will ooze a lot, which not only reduces the nutritional value of the tea, reduces the tea fragrance, but also increases the harmful substances. If you drink this tea for a long time, it will endanger your health and lead to many diseases of the digestive, cardiovascular, neurological and hematopoietic systems.