Our portion of this rack is the central core of clear and frost Plexiglas acrylic sheet along with the cast acrylic tubes used to hold the wine bottles.
This rack was fabricated from 1/2" thick clear acrylic sheet on the outside layer, and then the same thickness of Plexiglas Frost acrylic sheet.
Holes were routed (by hand) into the inner and outer layers to support the clear cast acrylic tubes that will hold the wine bottles. This tubing has a 3/8" thick wall.
Let's look closer at the tubing used: