Norpro 591 Canning Bubble Popper & Measurer

Amazon.com Price: $5.69 (as of 04/08/2023 10:35 PST- Details)

This bubble popper and measurer is used while canning to remove air bubbles before sealing jars.
Insert In Jars To Easily Remove Air Bubbles Before Sealing Measure Head Space To Avoid Or Overfilling Jars
To make sure that air bubbles have not been Trapped inside the jar, run a bubble popper around the edges of the jar, gently shifting the food, so that any Trapped air is released.