I would put it in a glass jar. I'm not saying there is holes in your plastic bag but the longer cannabinoids are exposed to air the more they degrade into non-psychoactive cannabinoids such as CBN and such with only mild effects. So just to be sure that it's not happening I'd just get some type of air-tight jar or bottle to keep it in rather than a plastic bag. I used to HATE what happened to my weed after a few weeks in the bag..