Thermos® Evidently sometimes it's a trademark, and sometimes it's not.

In Canada, Thermos® is a registered trademark of Thermos LLC. But evidently not everyone at Miniso knows that. Of the three vacuum containers that Minso sells, one uses the Thermos name. (Without the ®.)

On the other hand in Canada it is possible find Thermos products for sale that use the Thermos® name. 

"Genuine Thermos® Brand" travel mugs, Staples

What is likely to happen? Well Staples is in the clear, but if and when Thermos® gets wind of this infringement Miniso will get a tersely worded legal letter demanding that the firm, "cease and desist" using the Thermos name.