Stainless Steel Coffee Tumbler with Handle

The stainless steel inner layer is not ready to use right away. We do electrolytic polishing on the inside. We put the inner cup into an electrolyte bath and run electricity through it. This removes burrs and oxidation. The inner wall becomes very smooth. Dirt and smells cannot stick easily. After electrolysis, we do passivation. Passivation creates a thin oxide film on the inner surface. This film stops metal ions from coming out. When you put acidic drinks inside, there is no metal taste. This stainless steel coffee tumbler with handle meets food contact material standards. Many customers say our cups do not change the taste of coffee.

After electrolytic polishing, we measure the inner wall with a surface roughness tester. The Ra value must be less than 0.4 microns. This is higher than normal industry standards. A smaller Ra value means a smoother surface. A smooth surface does not collect dirt and is easy to clean. We use an endoscope to check corners. If we find a rough area, the cup goes back for rework. Our quality staff checks 20 inner cups every day. If more than one fails, the whole batch is redone. This keeps every product clean and safe.

You can choose 280ml or 380ml for this product. The smaller size keeps heat for 6 hours above 38℃. The larger size stays above 40℃ for 6 hours. The handle makes it easy to hold. You can use it at home, in the office, or in your car. We also offer custom paint, powder coat, and patterns. The inner wall is very smooth, so cleaning is simple. Drink your coffee without any strange smells. This stainless steel coffee tumbler with handle gives you a premium drinking experience.

Here are five important specs for this stainless steel coffee tumbler with handle.

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