Extract resin from your favourite herbs and flowers. Extract resin from your favourite herbs and flowers. This 5 Bag, 5 Gal set are used in conjunction with ice and water. The ice and water is stirred and filtered through the 5 bags to seperate the resin that collects at the bottom of each bag. Simply dry the resin and it can be used. These bags can be used over and over again they just need cleaning then drying. Don’t waste all that extra leaf matter that you normally throw away.