How long can the thermos cup keep warm?
Different thermos cups have different heat preservation time. A good thermos can keep warm for about 12 hours, while a poor thermos can only keep warm for 1-2 hours. In fact, the average thermos cup can be kept for about 4-6 hours. When buying a thermos cup, there will be an introduction explaining how long it will be kept.
Which brands of thermos cups are good?
Xiangyin brand vacuum flask
Price: 2 19
Features: stainless steel liner material, feel size is more appropriate, relatively speaking, this hand-held degree is the best. The cover may be layered and have a filter layer.
Tiger brand thermos cup
Price: 208
Features: stainless steel liner material, which is the smallest and the capacity is slightly insufficient.
Shan mo Shi pai vacuum flask
Price: 225 pounds
Features: stainless steel liner material. Personally, I think the biggest feature of gourmet chefs is that their caliber is particularly enlarged ~ it is very suitable for soaking big things like lemon grosvenor momordica.
Supor brand thermos cup
Price: 109
Features: stainless steel liner material, relatively large capacity, characterized by a rubber ring next to the cup mouth to prevent burns, more user-friendly.
Will the thermos cup keep warm all the time
The insulation effect of the thermos cup will gradually deteriorate with the increase of time.
Vacuum pumping can't achieve absolute vacuum, so a getter will be added to the cup to absorb the residual air. The getter has a "shelf life", and the natural heat preservation effect will become worse after the quality guarantee.
Are imported thermos cups necessarily better than domestic ones?
Not necessarily.
Domestic brands and foreign brands do not have the same insulation effect as everyone imagined. After all, vacuuming is not a great technology. Of course, lax quality control and lack of attention to technology are common problems in China, and details determine quality! As the saying goes, you get what you pay for, but compared with domestic thermos cups, the price of foreign brands is often several times that of domestic brands, but the insulation effect may only be two hours more.
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.
Appraisal of thermal insulation of lining
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.
Distinguishing sealing performance
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.
Environmental protection identification of accessories
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.
Identification of stainless steel materials
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.