I'm afraid I can't answer those questions as I'm not in the US; I wouldn't want to risk answering them and giving you incorrect information. I'm sure somebody more knowledgeable about the USPS and US laws etc. will come along and will be able to help you out though. My OPINION is that your product would simply be seized and destroyed. However, please do not consider that opinion as advice because I honestly have no idea how they view things like this in the US. Libertas