Many high-end espresso machines offer wooden accessories to upgrade the looks of the machine. There weren't any available for the Breville Bambino Plus.  I found these button caps which are made of real walnut finished in a clear coat for protection and waterproofing.  These self-adhesive cover caps have a high-performance acrylic Ultra-Bond™ PSA adhesive on the back which increases in strength as it cures, providing a long-lasting permanent bond. 

When I say they are "sticky", I mean it.  The easiest way to apply to the buttons on the machine is to peel them off and use a toothpick on the very edge so you can position the cap exactly where you want it (all the grain running in the same direction looks nicer) before pressing in. place.  Make sure to unplug or turn off the power source before applying since you would be activating the machine by pressing the buttons...

I've included an extra large and small button for back-up so you get a total of four 14mm buttons and three 11mm buttons.  Since all the different Breville machines have different size buttons, I'm only making them available for the Breville Bambino Plus...but I may see if there are any available in other sizes if there is any interest.

Buyer pays $5.99 flat rate USPS Ground Advantage shipping.