What do stagehands typically use cans for in a production?

Stagehands utilize cans primarily for communication during performances, especially in situations where silence is crucial. These cans, often referred to as "cans" or "communication cans," are equipped with a communication device or radio which allows stagehands to relay instructions and information to each other discreetly. This is essential in maintaining the flow of the production without disrupting the performance or drawing the audience's attention.

In many productions, especially live events where timing is critical, the ability to communicate clearly and silently is vital. This ensures that stage changes, cues, and other important actions can be coordinated without audible signals that might distract or interfere with the performance itself.