My post office has no issues mailing any oil. I walked in, told her what it was (they mail this sort of stuff quite frequently apparently), and since I kind of know her too (my mother used to work there), she got me a box and some of those air pads for the box since just mailing the round, black bottle "wouldn't be such a good idea." Anyways, mailed it Prioirty Friday afternoon, and I had my results from Blackstone in my e-mail inbox Monday morning. Not too bad for $4.95 IMO.