Kolsyrepatron Soda Stream Tom | Carbon Cartridge Empty

I am selling this empty carbon cartridge (kolsyrepatron). This can be used for Soda stream or other sparkling water makers. (In order to buy a full cartridge in the shops you always need to return an empty one first.) Pick up in Professorslingan 10 or we can also meet at Stockholm University (Frescati Campus).