I know I am going to catch alot of flak from this post, but here goes....Katie is right. I work for the post office and I can tell you...items sent it letters, unless they are in fact leter, have'nt got a chance. The new high speed equipment used to sort mail handles 40,000 pieces an hour, and each peice must be processed at least 6 times in transit before delivery. Chances of anything inside an item that is not paper making it through the system is slim. If it makes it, you make get two chips for the price of one. Or many more pieces. Mail your chips in padded envelopes it is well worth the extra $0.11 postage and cost of the padding.