A 6.6-litre bowl in 18/10 stainless steel is not a luxury item but a serious piece of kitchen equipment. Professional kitchens choose metal for everything that holds more than a couple of litres, because metal does not deform in hot water, does not absorb the flavours of what has been in it before, and does not flex under the weight of a heavy dough.
Hestan Provisions maintains the same material standard as the rest of Hestan's range, the brand Thomas Keller chose for The French Laundry and Per Se. Dishwasher-safe.