I love upcycling wine corks. Recently, I upcycled wine corks into funky buttons. It's an easy DIY project and costs very little! You slice the wine corks into small rounds then mod podge paper onto one side. I then added 2-3 coats of wood varnish to give the buttons a resin-type finish.
Once the wood varnish dried I added screw-in eyelets to the back then they were good to go!