Yes, it has to be large glass mason jars. The ones with the metal lids. But thats just for assurance in high quality. If you dont want the high quality, then use what ever you see fit. If you do use the jars, only take the lid off for a few minutes each day(10-15min. max.). You MUST make sure the jars stay as dry as can be. The buds MUST stay dry during curing proccess...