How many ml tourist vacuum insulation pots are good and convenient?

This thing depends on how many people you use and how much water you drink. Generally, the amount of heat preservation used in summer is less, because you drink more cold boiled water. The thermos pot for traveling in winter is more practical.

Our home is 1.5L. I usually travel by myself with my five-year-old children.1.5l kettle, 550 ml water cup, one for each of us. It can basically meet the daily water consumption (about eight hours).

However, 1.5 liters of water and two cups are really heavy to carry. For the sake of the children, I think I should carry it more heavily. Outdoor water is the source of life.

Noun explanation:

Modern thermos was invented by British thermos physicist Sir James Dewa in 1892. At that time, he was engaged in a research project on liquefied gas. In order to liquefy the gas at low temperature, he first needs to design a container that can isolate the gas from the outside temperature, so he asks the glass technician Berg to blow a double-layer glass container for him, coat the inner walls of the two layers with mercury, and then vacuum the air between the two layers. This kind of thermos, also called Dupin, can keep the temperature of the liquid in it constant for a certain period of time.