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<p>[QUOTE=&quot;rlm&#039;s cents, post: 524640, member: 7957&quot;]Actually, no and no.&nbsp; Ever buy a package (brick) of coffee.&nbsp; Maybe it is not cheap (the coffee anyway), but not done in a laboratory and not that expensive.&nbsp; BTW, if it were not air tight, it would no longer be a brick.</p><p><br /></p><p>Your first question was are the holders air tight.&nbsp; I have heard nothing about a guarantee to that effect, but I will bet that 99% of them are about as close as you can get.&nbsp; Now Doug is going to come by and tell you that the plastic is not a perfect seal.&nbsp; Technically, he is correct, but I will bet if you put the coin in a vacuum originally, it would be centuries before the vacuum would be lost.&nbsp; That is not perfect, but darned close.[/QUOTE]</p><p><br /></p>

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