This 20oz tumbler is crafted from high - quality 304 stainless steel. The cup body has a shiny surface and comes with a stainless steel straw. Measuring 6*7*22cm, it's a perfect size for daily use. Note that when filled with hot water, the steam might lift the cup lid, but this is normal and not a quality issue.

Using this tumbler is super easy. Just remove the lid, fill it with your favorite hot or cold drink, and then put the lid back on. When it comes to cleaning, you can simply wash it with mild dish soap and warm water. Remember, if you're using it for hot drinks, be aware that the steam can lift the lid. It's a normal phenomenon, so don't worry. To keep it looking shiny, avoid using abrasive cleaners. Store it in a dry place when not in use.