With so many superyachts out there for charter a great point of difference would be to have sustainable products on board from interior cleaning products, to bathroom products organic shampoo, natural soaps, sustainable toothbrushes and natural toothpaste continuing on too organic cotton bedding.
Plus if there was a large market for this idea, organic meat, dairy products, grains, fruit and vegetables. I think this would only be possible in the Mediterranean, Australasian areas otherwise it would have to be freighted in.
Check out this website on http://www.gobamboo.co.nz/
Check out there blog on different environmental issues http://www.gobamboo.co.nz/blog/