Undersink Organization - Chaos under your sink? Tame a crowd of spray bottles by installing a curtain rod across the cabinet. Suspend them by their spray triggers, and voila! Freed-up space for other bathroom or kitchen essentials.
49 Brilliant Garage Organization Tips, Ideas and DIY Projects - Page 31 of 49 - DIY & Crafts. This looks like Bouillon Cube jar lids screwed to the board, so jar part can screw onto the lid. I've also seen done with baby food jars.