Start with a wood block; make straight cuts of varying widths. Sand the edges and corners, and apply a coat of natural wood stain and sealer; let dry. Apply cabinet bumpers on the four corners of each of the bases to keep surfaces scratch free.
buy a cheap drink tray, layer with different and unique beer bottle caps, then cover in resin or epoxy! can paint the bottle caps. maybe spray paint silver or something then make them the bottom of a tray that holds stuff for the centerpieces?