Plastic cups because of its changing shape, bright colors, fear of beating characteristics, loved by many people, ideal for outdoor users and office workers to use. In general, the bottom of the plastic cup logo, is the code on the small triangle, the common is the "05", on behalf of the cup material is PP (polypropylene). PP cup material has good heat resistance, melting point 170 ℃ ~ 172 ℃, chemical properties are more stable, in addition to be concentrated sulfuric acid, concentrated nitric acid erosion, the other chemical reagents are relatively stable. However, the problem of ordinary plastic cups is very common. Plastics belong to the polymer chemical materials, with plastic cups filled with hot water or boiling water, the polymer is very easy to precipitate dissolved in water, drinking on the human health harmful. And the inner plastic microstructure has a lot of pores, which hide the dirt, clean the bacteria will breed. Therefore, the choice of plastic cups for plastic material selection is very important, we must choose to meet the national standards of food grade plastic. That is, PP material.

Currently, almost every family and unit prepares disposable toilet paper cups, one for one, throws away when used, and is hygienic and convenient. However, such a common cup can hide many problems. There are three types of paper cups on the market: the first one is made of white cardboard and can not contain water and oil. The second is the waxing paper cup, as long as the Sheng water temperature exceeds 40 ℃, the wax will melt, release of carcinogens polycyclic aromatic hydrocarbons. The third is a cup of paper, if the choice of materials is not good or the processing technology, but off, in the polyethylene melt or smear the paper cup will produce cracking changes in the process, resulting in carcinogens. To increase the toughness and stiffness of the cup, plastic cups are added to the cups. If the dosage is too large or the use of illegal plasticizers, health conditions can not be guaranteed.

The benefits of stainless steel cup is durable, rust and corrosion. However, the stainless steel cup belongs to the alloy product and contains more heavy metal substances such as nickel, chromium, manganese and the like, and if not properly used, the heavy metal substances are easily released and endanger the health. Therefore, in daily use, be careful not to use stainless steel cups filled with acidic drinks, such as juice, coffee, carbonated drinks, etc .; nor for a long time put soy sauce, vinegar, vegetable soup, tea, etc., because these foods may be electrolyte Heavy metals in stainless steel chemical reaction, resulting in precipitation of heavy metals. When washing stainless steel cups, do not use strong alkaline or oxidizing chemicals such as soda, bleach, etc., these substances are also easy chemical reaction with stainless steel.

Enamel cups is also a good choice. Enamel is inorganic glass material after thousands of degrees fused solidified on the metal on a composite material. Enamel coating on the metal surface can prevent the rust from enlarging, preventing the metal from forming oxide layer on the surface when heated and resisting the erosion of various liquids. Enamel products containing lead and other harmful substances, easy to carry and clean, widely used in daily life, eating utensils and cleaning appliances. Enamel cups have a disadvantage, afraid of bump enamel cup, the surface prone to damage. Studies have shown that there is a broken glass enamel cup easy to precipitate harmful substances should be decisively eliminated

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