Norpro 591 Canning Bubble Popper & Measurer

This bubble popper and measurer is used even as canning to take away air bubbles before sealing jars.
Insert In Jars To Easily Take away Air Bubbles Before Sealing Measure Head Space To Steer clear of Or Overfilling Jars
To ensure that air bubbles have not been Trapped inside the jar, run a bubble popper around the edges of the jar, gently shifting the food, in order that any Trapped air is released.
Allowing the right kind head space according to processing directions for specific foods is necessary in order that all of the extra air will be removed throughout processing and a tight vacuum seal will be formed.
Heat resistant plastic may not scratch jars.