I've done this many many times with great success. Take a scented candle, carefully hollow out the middle on the bottom end. Usually there is a sticker on the bottom, keep it intact so you can put it back on when you're done. I usually compacted the pot as much as I could and used plastic wrap to wrap it tightly. once it is inside the candle, melt the wax and pour it back in. Do this carefully and smooth over the bottom with the back edge a butter knife or something similar and put the sticker back on. Put it in a gift bag with a couple of other things like soap or lotion or anything else that would make sense that you can buy for cheap. Use the post office and send it overnight, give them a fake name and address for the return address and you're good to go.