Woot offers Shower Niche Recessed Triple Shelves for $35.99 (orig. $92.88) free shipping.

Product Description:
100% WATERPROOF: We have the product done by injection molding which thepart is to be one whole piece, no penetration of water, no leakage and100% waterproof.

• 100% WATERPROOF: We have the product done by injection moldingwhich the part is to be one whole piece, no penetration of water, noleakage and 100% waterproof.
• DESIGN BY AMERICAN PROFESSION TEAM: Round corners, no sharp edge with safety; 4 side pre-sloped keep water off the shelf.
• Dimensions: Inner dimension:①14"*14"*3.88", ②14"*14"*3.88", ③14*6*3.88"
• 10 YEARS GURANTEE: Made by light weight and durable ABS material, will not rust and leak.