A simple, sturdy, and reliable wine glass holder for your bathtub. This will attach to the horizontal grab bar that most bathtubs have. It only utilizes a suction cup to reduce wobble; not as the mode of attachment.
Your bathtub needs a Ø.875" (22.2mm) horizontal bar that is approximately 1.7" (43mm) on center from the wall. The suction cup is a standard size of Ø1.75" (44mm).
This is a remix of my previous Bathtub Wine Glass Holder. I have improved on the range of wine glasses that can fit into this holder by utilizing three bumps instead of a cone-shaped cradle to provide better stability across different wine glass shapes/sizes. The design also has improved aesthetics over the previous iteration and has a thicker cross-section around the suction cup slot (which cracked on me with the previous design).