Hanging Towel Rack

For those of us that live in apartments and can not drill into the walls; i made a towel rack that hangs above a sink.
All the ones i found needed to drill or stick something to the cabinets or walls and i don't like doing that with rentals so i made one that it all friction based.
I also wanted something that would hang over the sink so the towels drip in an existing basin and not on a counter or a tray that gets moldy.

The clamps are from this thing
https://www.thingiverse.com/thing:16