Safety & Reliable



Free Sample

Response within 24 hours


Competitive Prices

High cost-effective


Some tips for vacuum thermal insulation

Vacuum cup, as its name implies, such bottle can keep water inside a certain temperature within specified time. When we value the quality of a vacuum cup, the major factor is the thermal insulation. First of all, we should make sure the material of steel to be SS304 or SS316, as these two types of stainless steel meet the national vacuum cup production requirements. Besides, the thickness of stainless steel is also an important element. Generally, thermos cup is made of inner and outer layers, welding technology is used to combine the liner and shell together, and then vacuum technology is used to pull out the air between the liner and shell to achieve the effect of vacuum insulation. stainless steel vacuum cup with thicker material can accept higher vacuum pressure, then higher vacuum insulation comes better insulation performance.

Then what is the principle of heat preservation for stainless steel bottles? In brief, the principle of thermal insulation is to block the transmission of heat in these three ways—radiation, convection and transfer. The silver inner of the thermos reflects radiation from the hot water, the vacuum between the double wall can blocks heat transfer, and in return blocks heat convection. Therefore, the quality of thermos cup mainly depends on whether the three ways of transmission are blocked, as long as the thermal transmission of thermos cup can be blocked perfectly, it can with excellent performance on heat preservation and cold preservation.

According to the steel insulation container standard, under room temperature of 20 degrees, pour into more than 95 degrees of boiling water in the thermos cup with capacity of less than 400ml, cover the lid tightly for 6 hours, the water temperature shall not lower than 42 degrees. While for cup capacity between 400-600ml, the water temperature should not lower than 54 degrees Celsius after 6 hours. This is the way to identify the quality of vacuum insulation performance, it just takes long time.

Here is another simple way. Pour the boiled water into the vacuum cup and tighten the lid for 2-3 minutes, then touch the outer surface of the cup body with your hand, if the cup body is obviously warm, it indicates that the production has lost vacuum degree and can not achieve good thermal insulation effect.

Share it :

Email us to Get Free Samples!

More latest products, sales promotions and free samples are here!

Wholesale Water Bottles?

blog products

Low moq, free samples, OEM, best price. Send us an email or submit an online message.

"2023 Canton Fair Stainless Steel Water Bottle" received an inquiry from M***
"2023 Canton Fair Stainless Steel Water Bottle" received an inquiry from E***
"Custom Wholesale Sports Protein Shaker Bottle" received an inquiry from I****
"Wholesale Sport Water Bottle Stainless Steel Insulated with Bamboo Lid" received an inquiry from R***
"Wholesale 475ml Double Wall Stainless Steel Food Container from China" received an inquiry from X*****
"Wholesale 500ml Vacuum Insulated Water Bottle With Cup" received an inquiry from P*******
"Wholesale Sponge Bottle Cleaning Brush with Suction Cup Stand" received an inquiry from J****
"One-button Switch 300ml 10oz Double wall Stainless Steel Vacuumn Coffee Cup Wholesale" received an inquiry from B******
"Wholesale 700ml Plastic Protein Shake Bottle From China" received an inquiry from Y***
"China Sports Protein Shaker Bottle Supplier" received an inquiry from L******
"Wholesale Stainless Steel Long Handle Sponge Bottle Brush" received an inquiry from G*******
"Wholesale 700ML Blender Bottle Shaker Bottle with Pill Organizer" received an inquiry from W***

Best Selling of the Month

We will match or beat any price, best quality and service guaranteed.
popup img

Get A Free Quote

A free price list customized to your specific needs.

√ We respect your confidentiality and all information are protected.

free samples


Fast shipping within 24 hours!

√ We respect your confidentiality and all information are protected .

Get A Free Custom Quote

√ We respect your confidentiality and all information are protected.