Amazon offers Prime members the Zenna Home Over-the-Faucet Shelf in White/Chrome, model no. 8665SWP, for $6.43 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $7.58.) That's at least a buck less than you'd spend at a local retail store, although most merchants charge $17 or more. It features plastic trays; a chrome, rust-resistant finish; and measures 22" x 8" x 6".