silifine 8 set plant watering devices include self watering spikes and 26 oz plastic bottles plant waterer devices with adjustable control valve switch indoor outdoor (blue) blue 8 is up for auction in Patio, Lawn & Garden. The current bid is $1.50, 95% below the $32.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.