Hi Lisa,
Like the old-fashioned Tupperware, If you press down hard on the lid (provided it's also somewhat flexible plastic), as you snap the last of the lid rim down, you'll at least create negative pressure inside, but not complete vacuum.

If you're sealing dry ingredients, this should help prolongue their shelf life a bit. If you're using zip-bags, a plastic drinking straw stuck in an unzipped corner and some good lung-power can suck out all extra air and then you quick withdraw and zip simultaneously. This is great for freezing stuff, but it's also good for sealing smaller quantities of things that can then fit well into buckets without extra air in the bags.

If you scouted the internet, you might find the small rubber or plastic valves the some vacu-seal containers use, but then you'd still have to vacuum. There are some food-storage vacuum systems, but they get pricey fast. Still, your buckets sound like a great resource!

Be well,
Léna
On Jul 15, 2011, at 4:08 PM, Lisa wrote:

An obvious off-topic question.., but here goes.

I’ve got several white plastic buckets (that used to hold a variety of icings/jellies etc. from a local bakery). I’ve washed them, rinsed etc. and am now storing pastas, beans and the like in them. They seal fairly well, but quite frankly I’d feel better if I could actually suck all the air out of them. Isn’t there a way I can do this without having to purchase dry ice or lots of mylar bags/oxygen absorbers? I figured with all the brilliant minds we have on this list I’m sure that somebody has been able to do this successfully…would you please share?

TIA

Lisa