Now available on the Speedster Stoves website. Fill your own coffee bags - speedsterstoves Enjoy a proper mug of coffee on your travels. A huge improvement over prefilled coffee bags. You can get up to 22g of ground cofffee in each bag, meaning you can tailor your brew to your own tastes. Bags have a "money bag" closure, which you can then heat seal (preferred option) or staple to seal. Heat sealing options include a proper bag sealer, iron, heated skewer/knife edge, hair straighteners etc.