When I was a younger man the only way I got weed was in plastic baggies. That being said, it's probably the worst way possible to store fresh bud other than wrapping it in a paper towel. It may be a good way to keep a sandwich edible for a single day but it's a poor substitute for a glass jar or other airtight container stored in a cool dark environment. My suggestion is to bite the bullet and get more jars. We expend a lot of time, effort, and money into our grows so it only makes sense to cure and store it accordingly. Growing is only 50% of the process. Often times drying and curing can mean the difference between so-so and epic bud. Once a plant is harvested, the process of development doesn't end. Just my 2 cents -