The key to the insulation performance of the thermos cup lies in the inner container. After filling with boiling water, tighten the lid of the thermos cup. After about 2~3 minutes, touch the outer surface of the cup body and the lower part of the cup body with your hands. If you find a warm feeling, it means that the heat preservation performance is not good enough.
Second, look at the tightness of the thermos cup.
After the cup is filled with water, tighten the lid of the cup and lay it flat on the table without water leakage; The rotation of the lid and the mouth of the cup should be flexible and there should be no gap. If there is no leakage, it proves that its sealing performance is good.
Third, are the accessories healthy and environmentally friendly?
Whether the plastic part of the thermos cup is healthy and environmentally friendly is very important. If the thermos cup is made of food-grade plastic, it has small smell, bright surface, no burr, long service life and is not easy to age; If it is ordinary plastic, it will be inferior to food-grade plastic in all aspects.
Four. Identification of stainless steel materials
Chromium, nickel and manganese are indispensable metal elements in stainless steel. If the stainless steel material is unqualified, pouring hot water for a long time may cause more heavy metals to migrate into the water, which will bring hidden dangers to the baby's health.
Among the common stainless steel varieties, 304 steel is one with less chromium migration, so it is easy to choose by looking at the number. Generally, stainless steel products will be printed with numbers such as "18-0" and "18-8", indicating that stainless steel materials contain 18% of chromium and 8% of nickel, and only materials that meet this standard are green products.
Verb (abbreviation of verb) simple capacity recognition method
The depth of the tank is basically the same as the height of the shell (difference 16- 18MM), and the capacity is in line with the nominal value. Some poor quality thermos cups will add sand and cement blocks to make up for the missing weight.
Myth: The weight of a cup (pot) is not necessarily good. Remind you that choosing a thermos cup suitable for your baby is really tangled. The material of the thermos cup, the insulation effect and whether the baby likes it or not are very important.