If you are really that paranoid about it don't put it in a liquid. I had a friend in the 70s who hitch hiked all over the country and would buy the giant sized jar of peanut butter, take part of it out of the jar and put his weed inside of it inside of a plastic container (tupperware like), then put peanut butter back on top. Store this in a bag or box with a loaf of bread, or some crackers and other types of snacks and it looks like your food stash not your dope stash.

Look as conservative as possible as you travel, some cops do like to hassle people from out of state.