This is the perfect stand for Keurig "My K-Cup" refillable coffee filter cartridges. It even fits the pre-filled K-Cup insert in my Keurig Duo machine (you have to take it out to fit the refillable cartridge).
The stand is also good for filling the cartridges, so you don't get coffee grounds into your machine.
The triangular cutouts save on filament and let you push the cartridge up from the seat with your finger when the cap isn't on.
Here is a link to the Keurig "My K-Cup" refillable filter cartridge for your information.
https://www.amazon.com/Keurig-Universal-Reusable-Ground-Compatible/dp/B0737B6HGR
Also, don't miss my modular mug riser pictured in the last photo.
https://www.thingiverse.com/thing:3992319
The product is designed by
jrhaggis