Did you choose the right thermos cup?Be careful not to step on thunder at 6 o'clock,

　　"When it's freezing cold

　　Give me a thermos and I can soak the whole world"

　　                                                                          A thermos cup,just looking good is not enough

　　For the health-preserving family,the best partner of the thermos cup is no longer the“outstanding”medlar.It can also be used to make tea,dates,ginseng,and coffee...However,a recent survey found that some thermos cups on the market are substandard.Good quality question.What?Quality problems?Poor insulation?NO!NO!NO!The heat preservation is almost tolerable,but the problem of excessive heavy metals is a big problem!

　　Appearance is the basic"responsibility"of a thermos cup,but when you hold it in the palm of your hand,you will find that the material is more important than the appearance.

　　Most of the thermos cups are made of stainless steel,with high temperature resistance and good heat preservation performance.Other materials such as glass,ceramics,purple sand,etc.,are only a handful of thermos cups due to factors such as heat preservation,drop resistance,and price.

　　Stainless steel materials are usually divided into three types,and the"code names"are 201,304 and 316.

　　201 stainless steel,the"inner ghost"who is good at camouflage✦

　　Most of the unqualified thermos cups exposed in the news use 201 stainless steel as the inner liner of the thermos cup.201 stainless steel has high manganese content and poor corrosion resistance.If it is used as the liner of a thermos cup,long-term storage of acidic substances may lead to the precipitation of manganese.Metal manganese is an essential trace element for the human body,but excessive intake of manganese can damage the body,especially the nervous system.Just imagine,if children are allowed to drink this kind of water all day,the consequences will be really serious!

　　304 stainless steel,the real material is very"handy"✦

　　The safety hazard of stainless steel in contact with food is mainly the migration of heavy metals.Therefore,stainless steel materials that come into contact with food must be food grade.The most commonly used food-grade stainless steel is 304 stainless steel with better corrosion resistance.In order to be named 304,it needs to contain 18%chromium and 8%nickel,which is justified.However,merchants will mark 304 on the obvious position of stainless steel products,but marking 304 does not mean that it meets the requirements for food contact use.

　　316 stainless steel,noble origin does not stain"mortal dust"✦

　　304 stainless steel is relatively acid-resistant,but it is still prone to pitting corrosion when it encounters substances containing chloride ions,such as salt solutions.And 316 stainless steel is an advanced version:it adds metal molybdenum on the basis of 304 stainless steel,so that it has better corrosion resistance and is more"handy".Unfortunately,the cost of 316 stainless steel is relatively high,and it is mostly used in high-precision fields such as medical treatment and chemical industry.

　　                                                              There are hidden dangers,soaking should not be soaked

　　A thermos cup is just a thermos cup,so you can just soak goji berries in it.Naturally,it can't hold the whole world!Not only that,some things that are common in daily life cannot be soaked in a thermos.

　　1.Tea

　　Making tea with a stainless steel thermos cup will not cause metal chromium to migrate,nor will it cause corrosion to the stainless steel itself.But even so,it is not recommended to make tea with a thermos cup,because tea is usually suitable for brewing,and soaking in hot water for a long time will destroy the vitamins in the tea and reduce the flavor and taste of the tea.Moreover,if the tea is not cleaned in time and thoroughly after making tea,tea stains will adhere to the liner of the thermos cup and produce peculiar smell.

　　2.Carbonated drinks and fruit juices

　　Carbonated beverages,fruit juices,and some traditional Chinese medicines are mostly acidic,and they will not cause heavy metals to migrate if they are placed in a thermos for a short period of time.However,these liquids have complex components,and some of them are highly acidic.Long-term contact may cause corrosion to stainless steel,and heavy metals will migrate into the drink.When using a thermos cup to hold gas-producing liquids such as carbonated beverages,be careful not to put too much or overfill it,and avoid violent shaking to prevent the dissolved gas from escaping.When the pressure in the cup increases sharply,it will also cause safety hazards.

　　3.Milk and soy milk

　　Both milk and soy milk are high-protein drinks,which are easy to deteriorate when kept warm for a long time.If you drink the milk and soy milk that have been stored in the thermos for a long time,it will be difficult not to have diarrhea!In addition,the protein in milk and soy milk is also easy to adhere to the wall of the cup,making cleaning difficult.If you only use a thermos cup to hold milk and soy milk temporarily,you should first sterilize the thermos cup with hot water,drink it as soon as possible,and clean it as soon as possible.Try to be"gentle"when cleaning,and avoid using hard brushes or steel wool to prevent scratches on the stainless steel surface and affect corrosion resistance.

　　//Tips:choose your thermos like this

　　First,buy through official channels and try to choose products of well-known brands.When purchasing,consumers should pay attention to check whether the instructions,labels and product certificates are complete,and avoid buying"three no products".

　　Second,check whether the product is marked with its material type and material composition,such as austenitic SUS304 stainless steel,SUS316 stainless steel or"stainless steel 06Cr19Ni10".

　　Third,open the thermos and smell it.If it is a qualified product,because the materials used are all food grade,generally there will be no peculiar smell.

　　Fourth,touch the mouth of the cup and the inner liner with your hands.The inner liner of a qualified thermos cup is relatively smooth,while inferior thermos cups often feel rough due to material problems.

　　Fifth,food-grade silicone should be used for sealing rings,straws and other accessories that are easy to come into contact with liquids.

　　Sixth,after purchase,water leakage and heat preservation performance tests should be carried out first.Usually,the heat preservation time should be more than 6 hours.

　　Ervan Flaskis an innovative company with the mission of bringing intelligent,scientific and healthy drinking water to people.Products include thermos bottles,cold and warm bottles,smart thermos bottles,etc.,providing one-stop services from design,research and development to innovative manufacturing.Insulation mug made by Ervan Flask,made of 18/8 stainless steel,food grade PP and silicone material,double wall vacuum insulated 18/8 food grade stainless steel 100%BPA free stainless steel leakproof water bottle keeps drinks hot for up to 10 hours,cold for up to 18 hours,you can use it with confidence。