Coffee Mug Stainless Steel Tumbler

We do a hot and cold shock test on every product before it leaves our factory. First we fill the cup with boiling water. Then we put it in a freezer for two hours. After that, we take it out and fill it with boiling water again. We repeat this three times. This test mimics extreme use. Some people go from a warm room to freezing cold outside. Others go from air conditioning to hot sun. Our product must pass three cycles with no problems. No shape change, no paint bubbles, no drop in heat retention.

For customers in coastal countries, we do a salt spray test. We put the coffee mug stainless steel tumbler inside a salt spray chamber. The chamber sprays a 5 percent salt water solution at 35 degrees Celsius. The test runs from 24 to 72 hours. We check for rust on the body and bubbles on the paint. Japan customers ask for 48 hours of salt spray. We pass that. Germany customers ask for 72 hours. We pass that too. So this product works well near the ocean. It resists corrosion and stays beautiful.

This product is stronger than basic models. The inner layer uses SUS316 steel. SUS316 resists rust better than SUS304. The paint also holds up under extreme temperatures. You can take this mug on a boat, to the beach, or on a camping trip. We test each batch for salt and shock. Our team keeps records of every test. When you buy this coffee mug stainless steel tumbler, you buy a product that lasts. It handles heat, cold, and salt with ease.

The table below shows five important parameters for this coffee mug stainless steel tumbler.

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