Beaker (drinkware)

A beaker is a beverage container, and a term used in parts of the UK. A beaker is typically a non-disposable plastic or ceramic cup or mug without a handle, much like a laboratory beaker.

Beaker is particularly commonly used to describe a lidded cup designed for toddlers or small children, with a no-spill mouthpiece incorporated into the lid.

In North American English, the term is almost exclusively used in the laboratory context. Similarly shaped vessels in North American are referred to as "tumblers."

...
Wikipedia