the biggest way they smell it is if you wipe the scent all over whatever your carrying it in, from your hands to whatever was in the air at your house will be on it. Thats how they get all the weed and coke they seal up all nice, these dogs arent super canine, you rub the scent of whatever it is all over it getting it in there! Take weed, you can seal it in whatever you want, air tight, and youll still have the smell on the outside cause you were touching it. If you dont wipe LSD all over the thing its in they cant even really smell it, just dont expose it to anything else like weed or other illegal substances and it shouldnt have any problems, dont make it smell like anything by using perfume or coffee beans theyll smell that quicker than weed. Be clean is the phrase that comes to mind....
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"As your attorney i advise you to rent a very fast car with no top, and you'll need the cocaine."
My AIM: Thetripdoctor (im always on, Trust me)