Disc bottom cladded cookware are pretty easy to spot. You will see a thick piece of metal alloy at the bottom of the cookware. Moreover, you will notice that the bottom (cooking surface) is much thicker than the side of the cookware.
A fully cladded cookware is more difficult to spot because the cladding is throughout the cookware. So you will see a relatively thick cookware all around, not just at the bottom
Now, just because you don’t see a disc, it doesn’t mean it is fully cladded. It could simply be a single ply (no cladding) cookware.
Restaurant solid aluminum cookware are as such. No cladding. Most nonstick Telfon cookware are Telfon coated on aluminum cookware with no cladding.
For example, here is a nonstick pan from Calphalon. Just a thin layer of nonstick coating on an anodized aluminum cookware.
