Star Bakas thermal mug, steel 18/10, stamp 304.

You can use it with hot water. 

It maintains the temperature for up to 6 hours. It is tightly sealed and does not allow any liquids to leak, meaning you can put it in your bag. 

It does not change the taste of drinks because it does not react with them to form pure acetylcholine. 

It has a fully covered drink opening and is easy to open and close. 

Made of high quality stainless steel and has a seal. 

Starbucks thermal mug to keep drinks hot.