A general use long octagonal cylinder in 2 parts that screws together. I use it to carry re-usable straws so after use they can go back into the container for washing later. Use rubber band to create a tighter seal if needed, but I find that most of the mess stays where it should be until I get home and can wash up.
There are 2 parts, one male and one female thread to print. I would suggest PETG for this project.
You can scale to whatever size suites your storage requirements.
The author marked this model as their own original creation.