Standard international ink cartridges weigh almost nothing and are so compact in size that they can easily be stored anywhere. When traveling, though, you may want to keep your spare ink cartridges somewhere safe.
The Traveler’s Factory brass cases are available in two sizes, either for one cartridge or for two cartridges. They have a small brass ring attached to the top and feature a waterproof O-ring seal. All parts are made to very tight tolerances. When the cap is screwed onto the container, you can hardly see the seam between the two. Of course, the containers can not only be used for ink cartridges, but also for toothpicks, pills or other small items.