The thermos cup has been sought after by many people because it can keep the temperature of water constant. With the spread of the concept of health care, soaking in water in thermos cups has become the mainstream of health care. Some people report that the thermos cup is not insulated. What's going on here? Let's take a look!
1
Poor sealing
The water in the thermos cup is not hot, probably because it is not well sealed. After receiving water with a thermos cup, it depends on whether there is a gap in the bottle cap or other places. If the lid of the thermos cup is not tightly closed, the water in the thermos cup will not be hot soon.
2
The cup is leaking.
Maybe there is something wrong with the material of the cup itself, and the technology of the thermos cup is also flawed. There may be a pinhole-sized hole in the inner container, which accelerates the heat transfer between the two layers of cup walls, so the heat is quickly dissipated.
three
The interlayer of the thermos cup is filled with sand.
Some merchants will put some sand in the interlayer of the thermos cup in order to shoddy it. This kind of thermos cup is still very warm when bought. After a long time, the sand rubs against the inner container, which easily leads to rust of the thermos cup and poor insulation effect.
four
Not a thermos.
Some "thermos cups" are so close that they can't hear the buzz of bees. Put the thermos cup in your ear. There is no buzzing sound in the thermos cup, which means that this cup is not a thermos cup at all. Such a cup is definitely not insulated.
five
What if the thermos cup is not insulated?
When using ordinary water cups.
The thermos cup can't be maintained without insulation, but it can still be used from the perspective of the cup. Although the heat preservation time is not ideal, it is still a good cup. If it has special significance, it can still be used, but the heat preservation time is short, but it is still intact. This is also a low-carbon life and a healthy life.
six
How to choose a thermos cup
The quality of thermos cups on the market is mixed. It is suggested to focus on the thermal insulation performance of the liner structure, the sealing degree between the lid and the bottle, and whether the material releases harmful substances. , can be identified by four strokes.
This is the main technical index of the thermos cup. After the thermos cup is filled with boiling water, tighten the cork or lid clockwise, and touch the outer surface of the cup and the lower part of the cup body with your hands after 2~3 minutes. If it is found that the cup body and the upper part of the cup body are obviously warm, it means that the inner container has lost its vacuum degree and cannot achieve good heat preservation effect.
Fill a glass of water, turn it upside down for four or five minutes, tighten the lid, put the cup flat on the table, or shake it a few times. If there is no leakage, the sealing performance is good; In addition, it depends on whether the rotation of the lid and the mouth of the cup is flexible and whether there is a gap.
The environmental protection of plastic parts is also a problem worthy of attention, which can be identified by smell. If the cup is made of food-grade plastic, it has small smell, bright surface, no burr and long service life. Ordinary plastic or recycled plastic has a big smell, dark color and many burrs, and the plastic is easy to age and break.
There are many specifications of stainless steel materials, among which 18/8 means that this stainless steel material contains 18% chromium and 8% nickel. The materials that meet this standard are green products that meet the national food-grade standards, and the products are rust-proof and corrosion-resistant. If the cup body made of ordinary stainless steel cup is white and dark, it will produce rust spots if it is soaked in salt water with the concentration of 1% for 24 hours, which means that some elements contained in it exceed the standard, which will directly endanger human health.