hippo dam Shower Threshold Water Dam Barrier 67" - Transparent Collapsible Shower Water Blocker - Guard for Walk in Shower - Water Guard Stopper for Floor - Shower Door Water Blocker by Hippo Dam Transparent 67 Inch is up for auction in Home & Kitchen. The current bid is $0.05, 100% below the $16.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.