Squeezable

The accordion is a boxlike instrument, a squeezable bellows with a keyboard.

A decade later, both Heinz and Hunt's introduced a new inverted, squeezable ketchup bottle that rested on its flip-bottom cap.

The litany of packaging innovations introduced to or popularized in the U.S. food market over the last generation seems endless: flexible aseptic packaging, barrier plastics, squeezables, lightweight glass, the retort pouch, […]

Your other options are to hide the tubs and jars and buy squeezables for the guests' visit, or to buy separate containers and clearly mark which ones are gluten-free.