Plastic for just a few weeks is fine, but I would never store long term in plastic just due to the fact that it is gonna impart a plastic taste in the product eventually. I always use mason jars from walmart. If you or a family member likes pickles, get a few gallon jars of pickles and eat up, then clean the hell out of the jars then use them. I've seen large 2-5gallon candy canistors at walmart that are glass, just not sure what type of seal they have for the long term storage option.
I personally use wide mouth quart jars and put 1-1.5 oz bud in each jar without it being packed. I trim my tops into manageable quarter to nugget size pieces.