Microwave oven
A microwave oven was a type of oven that utilized microwaves to cook food.
In 2022, Pelia had a microwave oven in her Vermont curio shop that was called The Archeology Department. (SNW: "Tomorrow and Tomorrow and Tomorrow")
In 2024, Tallinn had a microwave oven in her apartment on a countertop next to her refrigerator. (PIC: "Fly Me to the Moon")
JR, Roo and Sprocket had a microwave oven that they intended to use in their asteroid deflector, but they were unable to beam it into space, because their deflector was clogged with butter. Instead, JR used a mini-deflector attached to a shuttle to blast an asteroid into tiny "popcorn"-like pieces. (SCO: "Asteroid Blasters, Part 6")