My Keurig coffee maker doesn't work well with standard size cups. The shelf is too low and when you make coffee it tends to splatter all over. This is because of the great distance between the nozzle and the cup. I designed a cup lifter to raise the cup about 50 mm and prevent the splashing. The cup lifter has pins that lock into the existing shelf to prevent it from sliding off and still easy to remove if you use a taller cup. You can edit the height of the base to accommodate your cup if needed.
The two pieces press fit together (snug fit).
I printed in PLA, it is washable but will probably warp in the dishwasher.