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QUITE Brilliant! - Seal a plastic bag with the top of a water bottle or any plastic bottle and the lid. Holy Moley where has this been my whole life?!? ---- so i tried this on 2-15-12. i used a 3 liter bottle its a little narrow you kind of had to shake it out roughly i would suggest using something with a wider neck. but this works great for sealing the bag !!!
(great idea for no electricity and using a food saver-read the 13th comment about how she seals her lettuce without electricity) I recently discovered that you can also use the 4.25 hand vac by Ziplock that is used for their ziplock bags. I use the pump with the Foodsaver widemouth attachment. It is less expensive, and no batteries or electric needed. Use the pump with spaghetti jars too. Prick a hole, cover with electrical tape and pump the air out.