The Munchkin secure grip bath caddy, the Umbra Aquala bamboo and chrome bathtub caddy, the Organize It All expandable bathtub caddy and the Spa Creations over tub caddy are highly-rated over-tub bath caddies. Each of these caddies has a 3.9-star rating or higher on Amazon.com, as of January 2016.
The Munchkin secure grip bath caddy has a 4.7-star rating. It holds toys and bathtub essentials, fits across a tub that is 31.25 inches wide, has extra grip handles that keep it secure, a soap dish with a wash cloth hook and two customizable dividers. It also has drain holes for fast drying and stopping mildew in bath toys. The Umbra Aquala bamboo and chrome bathtub caddy is made of bamboo and stainless steel and has a built-in wine glass holder, book prop and soap dish. It has a 4.6-star rating, measures 28 inches by 8-1/2 inches by 1-1/2-inch and expands to 37 inches.
The Organize It All expandable bathtub caddy stores shampoo, soap or anything else. It has a 3.9-star rating. The Spa Creations over tub caddy has a 4.1-star rating. It is constructed of epoxy-coated steel, adjusts to fit all bathtub widths, has a stemware and candle holder and an adjustable/removable book rack.