According to the related thermos articles published on Zhihu website in August, 2022, the eco-bird is a double-layer plastic glass, which is not hot, and the quality of thermos is good.
A thermos cup is usually a water container made of ceramic or stainless steel with a vacuum layer. There is a lid on the top of it, which is tightly sealed. Vacuum insulation layer can delay the heat dissipation of water and other liquids to achieve the purpose of insulation.
As the weather gets hotter and hotter in summer, people's outdoor activities become less and less, which makes our bodies gradually bec