vacumn sealing isn't the cure-all that some think and for it work properly it must be handled with clean hands. once it's sealed then nothing inside can get out...so what's the purpose of bringing it in the 1st place? when i buy i want to sample or at least smell it before giving up cash so it just makes more sense to me and is far safer to do the deal after school, off of the property. and if one simply can't wait for school to get out for the day before buzzing, bring in a joint. carrying a bag in your pocket all day will break your flowers up into dust and body heat isn't the best temp for storing anything fresh...