I thought that I had found a post (back when I first started PBS) that told the proper way to ship nail polish?  I am trying to find it now and I can't. When I searched, all I found was the post that said nail polish was considered "hazardous" by USPS.  Does that mean we're not *supposed* to ship it? or do we just have to tell them at the counter that there is nail polish in the package?  I was thinking about it for a swap I'm doing, but if it's going to be a hassle, I can just buy something else :(  Thanks!!! :)

Sounds like a fun swap, but mailing could be a problem.  On the USPS.com, 'Can You Ship It' page, there's list of restricted items.  The actual list is on the second tab 'Hazardous Items' and yes it includes nail polish. 

Would seem to be overly cautious on their part, but many shippers do not wrap properly and I suppose broken nail polish bottles are not a happy event for their staff.

Thanks, Denise!

nail polish is a hazardous material and can only be shipped surface mail. That means no express, priority or first class. so you would have to ship it Parcel Post, which would be quite expensive for just a bottle or two of polish. You would need to package it up well, in a box, no padded bags and write ORM-D on the package

Good to know Brandy.  I thought ground shipping required using another vender such as UPS.

The chemicals in nail polish and perfume are flammable - the chemicals in urine are not.

right, and the companies who do drug testing have preapproved packaging for their "product"