What do you call a mug with lid?

There isn't one specific, universally accepted term for a mug with a lid. Here are some common options:

Formal:

* Travel mug: This is the most common and widely understood term, particularly for mugs designed for taking drinks on the go.

* Thermos mug: This term emphasizes the mug's insulation properties, typically used for hot beverages.

* Tumbler: While often associated with drinking glasses, tumblers with lids are becoming increasingly popular, particularly for cold beverages.

Informal:

* Mug with a lid: This is straightforward and easy to understand.

* Lidded mug: This is another simple and accurate option.

* Sippy cup: This term is usually used for children's mugs, but it can sometimes be used for adult mugs with lids.

Ultimately, the best term depends on the context and what you want to emphasize.