I've done similar before. I've taken T prop and loaded it into some old TRT T cyp vials so I could take them with me. I only took enough for the trip plus a day, and just threw it away before coming back into the U.S.. In my experience, not many people outside the U.S. give it much scrutiny. But if you're in your own transportation and you get busted with anything considered contraband they seize the vehicle. Not gonna risk that.