This is a re-creation of antohneeo's nespresso capsule holder so that I could add dimples for magnets for attaching to my fridge. It's also parametric so you can make them any dimension you want.
I also stole the idea of leaving a space for foil bulge on the capsules from Majorstrain's remix.
Update - July 2018
Made some tweaks to the design, notably the magnets now default to being on the back and I used bigger magnets.
I've now been using these for awhile and am very happy with them.