Stainless Steel Hot Flask

We buy our SUS304 and SUS316 steel from large steel mills. Every batch comes with a material report. The report shows chemical content and mechanical properties. We also send samples to a third-party lab for a check. We do not buy cheap second-grade material. Second-grade steel may have low chromium and nickel. Low chromium and nickel cause rust. Heat retention also drops. Our customers want their bottles to last five years without rust. We meet that goal. That is why we trust the stainless steel hot flask to perform for years.

When steel arrives at our factory, we do not put it into storage right away. Our quality team first checks the material report. Then they measure the sheet thickness with a caliper. The error must stay within 0.05mm. They also look at the surface. No scratches or rust spots are allowed. Good steel goes into storage. Bad steel goes back to the supplier. Every batch has a record. We can trace which mill and which batch made the steel. This traceability gives you confidence in every stainless steel hot flask you buy.

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 heat level is excellent for bottles of this size. It works well in an office or a school. 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. When you order the stainless steel hot flask, you get a product with a clear material history.

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