Wall Mates Push 'N Stay Suction Plant Holder / Shower Caddy - Square - W3-1/2" x D3-1/4" x H2-3/16" - holds up to 8 lbs - brand new, never used - $6 firm DESCRIPTION: Works on clean and smooth, non-porous surfaces including tile, glass, metal, fiberglass and smooth, varnished solid wood. INSTRUCTIONS: Clean and dry surface before use. To Activate Vacuum Seal: Press and hold the rubber suction cup against the surface and push down to activate the vacuum seal. To Remove: Simply lift the holder up to release the vacuum seal.