The DiSwirl is a very old mold owned by the Burt Co and distributed by MWGS. A few years ago MWGS got new owners and started selling the chips again. I think Atlantic Standard converted the DiSwirl to injection mold for MWGS. I have several, one indian reservation in the midwest and at least one day boat in FL.
They are not clay composition chips.
The indian reservation did not have them on the tables for long. It was the 1st new Diswirl I had seen. I called them and could not get any information on where they got them. In fact the 1st 3 people, including the poker manager, said they never had such a chip.

The cruise ship is the Diamond Royal out of Cape canaveral, at least that is what I was told. The OHKay is the other one. I have one more somewhere.