Be alert to the safety hazards of insulated cups, and pay attention to these 6 points when purchasing

The weather is cold and the earth is freezing, so it's natural to leave without a thermos when going out. However, recent investigations have found that some insulation cups on the market have quality issues of shoddy quality. Drinking water from unqualified insulated cups can pose health risks. So, what are the issues to pay attention to when choosing insulation cups with a wide variety of specifications on the market?
Material is more important than appearance
When choosing a thermos cup, people often value its appearance and insulation performance, and may not be very concerned or familiar with the material of the thermos cup. However, the material of the insulation cup is the key to determining the quality of the insulation cup.
Most insulation cups are made of stainless steel, which is resistant to high temperatures and has good insulation performance. Insulating cups made of other materials, such as glass, ceramics, and purple sand, have a low market share due to factors such as insulation, anti drop, and price.
Stainless steel materials mainly include three categories: 201, 304, and 316. What are the differences between them?
201 stainless steel
Most of the unqualified insulation cups exposed in the news use 201 stainless steel as the inner liner of the insulation cup. 201 stainless steel has a high manganese content and poor corrosion resistance. If it is used as the inner liner of the insulation cup, long-term storage of acidic substances may lead to the precipitation of manganese elements. Manganese metal is an essential trace element for the human body, but excessive exposure to manganese can cause harm to the human body, damage the nervous system, and cause greater harm to children in their growth and development stages.
304 stainless steel
The main safety hazard of stainless steel in contact with food is the migration of heavy metals. Therefore, the stainless steel material in contact with food must be food grade stainless steel. The most commonly used food grade stainless steel is 304 stainless steel with good corrosion resistance. This type of stainless steel requires 18% chromium and 8% nickel to meet the standard.
It should be noted that many merchants will label stainless steel products with the word 304 in a prominent position, but labeling 304 does not mean that it can meet the requirements for food contact use. 304 stainless steel products must pass the inspection of relevant standards (GB 4806.9-2016) to meet the requirements for food contact.
316 stainless steel
304 stainless steel is relatively acid resistant, but it is still prone to pitting corrosion when encountering substances containing chloride ions, such as salt solutions. 316 stainless steel has added metal molybdenum compared to 304 stainless steel, making it have better corrosion resistance than 304 stainless steel. However, due to its high cost, 316 stainless steel is mostly used in medical, chemical and other fields.
How to select qualified insulation cups
Firstly, purchase through legitimate channels and try to select products from well-known brands. Consumers should pay attention to checking whether the instructions, labels, and product certificates are complete when purchasing, to avoid purchasing "three no products".
Secondly, check if the product identifies its material type and composition.
Thirdly, open the insulation cup and smell if there is a serious odor. If it is a qualified product, the materials used are food grade and generally do not have any odor.
Fourthly, touch the rim and inner liner of the cup with your hand. The inner liner of a qualified insulated cup has a smoother feel, while most low-quality insulated cups have a rough feel.
Fifth, accessories such as sealing rings and straws that are prone to contact with liquids should use food grade silicone.
Sixth, after purchasing, water leakage and insulation performance tests should be conducted first, usually with a insulation time of more than 6 hours.