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Good idea! :) That is how the Vac n' Seal hand pump vacuum system works with its adhesive tabs. And this would probably give you a stronger vacuum too. Thanks for posting this.

Dave

Today I went to open a pint jar of homemade playdough that I had sealed this way a few days ago and when I peeled back the tape nothing happened. I had to poke my needle through the hole again to let in the air. I think some playdough must have clogged the hole from the inside. I thought it was interesting that the lid was still sealed too tight to pull off with my fingers. Obviously if the hole is very tiny it takes much less "plugging power" to maintain a seal, so the tinier the hole the better the chance of having a good long term seal.

I just wanted to add another related tip. I recently discovered that it's possible to use the wide mouth jar sealer to seal a regular size lid onto a half pint jar. You simply nest the half pint jar inside a wide mouth pint jar, carefully place a regular size lid on the half pint jar, then clamp the wide mouth jar sealing device over the pint jar without a wide mouth lid. When the vacuum pump stops pull off the vacuum tube and the regular size lid will seal onto the half pint.