Bathtub Wine Glass & Candle Holder

Mounting this wineglass & candle holder should be done with 3m tape. I find suction cups to be unreliable and ugly.
The mounting area is recessed 1mm to hide the "tape mounting" gap.

On this version, mounting is done to the left side of the bathtub. Mirror 180 for right-side mount.
There is one large cupped area for a wine-shaped glass and a slot to insert the stem.
Small hole in front is for a crazy straw holder. ;) Or whatever.
Small slot on right does not go all the way through and is