Designers of the moment Roman and Williams created these bath accessories for the Ace Hotel in New York, using hardware parts sourced from McMaster-Carr. Dedicated DIYers could easily pull off the shower caddy and the towel bars; for more ideas on creating an industrial bath space, see Steal This Look: Ace Hotel Bath.
Above L to R: Bath hook, towel bar, and toilet roll holder, all made from powder-coated plumbing pipe. N.B. Wire & Twine sells a similar Industrial Toilet Roll Holder for $35.