2, metal cups, you can also carry metal cups when exercising. Metal cups are generally insulated, and metal conducts heat faster to prevent burns. Drinking water with a metal cup is actually good for your health, mainly because metal elements are good for your health, and it is actually more difficult to carry a metal cup when you go to fitness, because there will always be some bumps when you go out, and the metal cup is not easy to be damaged.
3, non-toxic plastic cups, fitness can also bring non-toxic plastic cups, because plastic cups are relatively light to carry, not as easily broken as glasses.