This Mountable Tub Shelf can be easily installed/removed when needed & can be adjusted to fit the tub of your choice. Keep your book, mug, snacks, & more in arms reach during tub-time or use it as extra storage for your other toiletries. The shelf has an integrated drainage system to keep water in the tub and not in your belongings. Vice-like grips utilize ball-and-socket joints to lock the shelf to any tub shape, creating a stable surface for the heaviest of mugs.