This is a simple support that, when printed in a flexible filament like rigid.ink ‘Bioflex’ or NinjaFlex, can absorb vibrations from your printer and reduce noise being transmitted to tables and other rooms. The shape is designed for the flavors of the FlashForge Creator Pro (2016 edition) that have the long-shaped feet, but they will fit any machine that has ‘feet’ shaped like a rounded rectangle of about 48×17mm, of at least 2 mm high. Of course you can scale the model within a limited range to adapt it to other printers (sorry, no customizers yet, my OpenSCAD skills are not yet up to snuff).

Apparently the FFCP 2016 is shipped with multiple shapes of feet, so check this before printing. If your model has the little round nubs, I have made a remix of this model that fits that style of feet.

The amount of flexibility can be controlled by varying the number and thickness of perimeters, and the infill. Optimal dampening performance should be achieved if you print them with the lowest possible infill and wall thickness that doesn't make them buckle under the weight of the printer.
When printing this with rigid.ink flexible PLA, my first print had 2 perimeters of default thickness in Slic3r and 15% honeycomb infill. This produced quite a stiff result. I printed a new version, still with 2 perimeters but with inner width forced to 0.5 and outer to 0.4 mm, and 10% rectilinear infill, which resulted in parts that are a lot more flexible, but I could probably go even lower.

You can of course also print this in plain PLA or ABS if you don't care about shock absorption and just want to raise your printer by 25 mm (an inch).