Tips for using thermos cup
Before use, preheat or precooling with a small amount of boiled water (or ice water) for 1 minute, and the thermal insulation and cold insulation effect is better.
Too much or too little water will affect the thermal insulation effect. The best thermal insulation effect is that the water volume is 1 ~ 2cm below the bottleneck.
Cleaning the inner container of the thermos cup with vinegar every month is beneficial to hygiene and long-term use. Cleaning method: after 1-2 drops of edible vinegar are diluted in warm water, pour it into a thermos cup, open the bottle cap and place it for 30 minutes, and then wipe it with a soft cloth.
When pouring cold drinks, add a few pieces of ice to keep the cold better.
Under special circumstances, when you don't know how to break the walnut, don't pick up your thermos and smash it, because the thermos is vacuum insulated. If you smash it, it may affect its insulation effect. Remember.