How big should I buy a water thermos for two people?

Buy a 1-liter thermos for drinking water for two people.

For boys, it is recommended to choose a thermos cup between 420~500ml. The size is just right. If it is too big, it will look bulky. If it is too small, it will be gone after just two sips of water. For girls, it is recommended to choose a thermos cup of about 350ml. The cup is relatively small and can be put directly into the bag, and the small cup looks more beautiful and delicate.

For daily use, 350~500ml is enough. If you are traveling, you should choose a large-capacity thermos cup of more than 600ml. If there are many people drinking water, it is recommended to choose about 1500ml. If you are alone, 1000ml. Will suffice.