Does anyone have experience sending samples from the US to Canada?

I use plastic 60cl bottles, so there would be nothing to show up on X-Ray. I also generally label it as a wedding/birthday gift on the outside of the package when shipping overseas.

Are there any special considerations for Canada, or should I just package one up and ship? I would hate to lose 60cl of a high dollar bottle without anyone (other than the inspectors) getting to try it.