Now a lot of people go to the gym after work, or go to the park for a run, a walk, so that the body stretch out, in order to let the occupational disease away from you. Exercise is not necessary is the loss of water, and this time need water to replenish energy, carbonated drinks have additives, will affect health, their own water is the best choice, portable water cup is not less. How do I pick a water cup that suits me? Then take a look at these.