Spoon XL Oval freestanding bathtub in Cristalplant – Benedini Associati, 2005 Bathtub made of Cristalplant® biobased material or marble, without tap holes; can be wall-mounted or freestanding. Cristalplant® version: with overflow hole, used with chrome-plated siphon .MET0477 or .MET0477C (.MET0434 or .MET0477C for exposed bathtubs). Marble version: uses siphon drain with integrated overflow system.