These feet made of Cosmetic Cotton Disks are designed to decouple the 3D Printer from other 3D printers on the same surface by absorbing vibrational energy, helping to minimize machine wear caused by vibrations. They act like a car's shock absorbers.
When you place a single printer on the desktop, the anti-vibration feet can effectively reduce the desktop shaking caused by printing.
The printer can oscillate, but like with original rubber Anti-Vibration feet it has no effect on printing. The vibrations are damped even faster due to the characteristics of the feet filler.
The walls should be as flat as possible so print with minimal layer thickness.
Put three Cotton Pads inside. Fold them as shown on the picture.
Use double sided tape to prevent your printer from running away.