Stainless Steel Double Walled Vacuum Flask

The lid is the most important part for leaks. Our lid has a silicone sealing ring inside. The silicone is food grade. It can handle temperatures from -20°C to 120°C. For our leak test, we fill the bottle with water and tighten the lid. We turn it upside down for 24 hours. Not one drop of water should come out. We also do a drop test. We drop the bottle from one meter high. The lid must not pop open. Our lid design has been improved many times. You can open it with one hand. But when you tighten it, it stays tight. The stainless steel double walled vacuum flask gives you leak-proof confidence.

This flask holds 310ml. The inner layer is SUS304 stainless steel. The outer layer is also SUS304 stainless steel. It keeps heat for 6 hours at 68°C or more. This is the same strong performance as our other 310ml models. We support custom work. The body can get paint or powder coating. For patterns, we do heat transfer, 3D printing, or water stickers. The MOQ is 3000 pieces per SKU. The stainless steel double walled vacuum flask is tested for leaks and drops.

Our after-sales team has a dedicated person. When a customer sends an email or WeChat message, we reply the same day. We require our team to give a first answer within 2 hours. We give a full solution within 24 hours. If the problem is product-related, we send a replacement or give a refund. We also share the issue with our production team. This stops the same problem from happening again. Many customers have worked with us for years because we solve problems seriously. We do not make excuses or delay. That is our promise for every stainless steel double walled vacuum flask.

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