It can stink, air tight bags are the way forward. Double it up!! Any airtight container, pop bottles are ok if dry, they are designed to not let any gas through where as some plastic is gas permeable.
When I worked in the alps I had weed in small plastic bottles then inside a thermos flask. Soon as I opened it the whole room stunk.
I used to have to roll one and walk 1mile up a snow track to keep away from folks. When I walked back I had a few comments about the corridor smelling of weed, this is 30mins after smoking a joint in wind. I think the altitude and below freezing temps made it stick to my cloths more and the smell last. I have never noticed this anywhere else in the world.