The Tieman Bathtub Caddy is sturdy and well-made.  It expands to fit various tub widths and has sections for various items, including a wine glass, book, iPad or phone.  For my purposes, I will use it for soap and other traditional bath tools.  A nice feature is that it comes with grippers than can be attached to the bottom so the caddy will not slip out of place.  It comes in three different colors.