Taking a shower and need a beer, wine, whiskey, small coffee, or some other beverage? Look no further. This cup holder was will handle just about anything. I was concerned that using a basic suction cup may not hold the weight. I don't want a glass object dropping, and potentially breaking, in the tub so I designed the holder to attach to one that will hold 5kg (10lbs+). The current design will hold a beverage container up to 80mm (3 1/8"). This doesn't really affect wine glasses as they sit on top.

Attach the suction cup to the desired location then slide the bracket behind it. Then, simply slide the cup holder in place and secure with small bolts. I've linked the needed parts below.

Suction cups: https://www.amazon.com/dp/B08LV4FTHJ?th=1&linkCode=sl1&tag=putnamfinds00-20&linkId=70a5bee2b4a7d9d6749b7e0fbe5e75a5&language=en_US&ref_=as_li_ss_tl

Screws: The bracket is 35mm wide and the holes are 7.5mm in diameter. I designed the bracket to work with these screw posts as they give the cleanest look but use whatever you'd like. https://www.amazon.com/Hillman-Group-3832-Aluminum-10-Pack/dp/B00IAVHHQQ?&linkCode=sl1&tag=putnamfinds00-20&linkId=eb8de499d46e6ae9c4d398a4a28f64f3&language=en_US&ref_=as_li_ss_tl