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<p>[QUOTE=&quot;Illya2, post: 49739, member: 2676&quot;]If you are speaking specifically about the brand &quot;Ziploc&quot; you can rest assured that it contains no vinyl (PVC). Ziploc brand bags are made of polyethylene which is generally fairly non-reactive with metals. So also are actual &quot;Tupperware&quot; products, at least the flexible storage containers. Tupperware did experiment with some hybrid ceramics a while back for use in the oven and microwave but they weren&#039;t really designed for long-term storage and weren&#039;t close to being air-tight. Other brands of flexible plastic storage containers (i.e. Rubbermaid) are generally either polyethylene or polypropylene, both of which are fairly non-reactive. The clearer more rigid plastics are often PET plastic or polyethylene terephthalate which is itself a highly stable plastic. There are some cheap no-name brands which are still made of vinyl but if you steer clear of those you should be okay. But amen to the silica dessicants.[/QUOTE]</p><p><br /></p>

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