6 Smart Tips to Choose A Vacuum Coffee Tumbler

1. Do not buy a coffee tumbler from unknown stores or market, try to choose well-known brand products. Consumers should pay attention to check the instruction manual, label and product qualification certificate, and avoid the purchase of those products without proper certificates.
2. Double 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” etc.
3. Open the vacuum bottle and smell it. If it is a qualified product, there is generally no smell because the materials used are food grade.
4. Touch the mouth of the cup and the inside layer. The inner bottle wall of a qualified vacuum cup is relatively smooth. Instead, a inferior vacuum cup feels rough mostly because of material problems.
5. Check the sealing ring, straw and other accessories that will touch your drinks or coffee. The should use silica lid should be food-grade without any special smell.
6. The bottle should be water leakage free and assured with insulation performance test. The standard insulation time should be at least 6 hours for both warm and cold drinks.