The first glass of water it is best not to drink, first boiled and water drained after four or five minutes, so that harmful substances in paper cups full of volatile. Because fluorescent powder, ink penetration is very strong, can contaminate foods.
Disposable cups and cartons of instant noodles and try not heated in the microwave oven.
Cups do not install the hot water as much as possible, because some manufacturers in order to prevent the infiltration of water in the paper Cup coated with a thin layer of wax, met more than 40 degrees when hot water will melt away. Therefore, disposable cups used to hold the best cold drink, and do not install more than 40 ℃ hot water.