Thanks for your question.
Vertex, unfortunately, does not make a 20 oz square bowl that's part of their Signature collection. The closest to 20 oz, and still part of the Signature collection is a 16 oz square bowl (Vertex # ARG-SB6). We do not currently sell this bowl, but we can very easily special order it for you. If this bowl works for your needs don't hesitate to give a member of our Tundra Restaurant Supply team a call at 1-888-388-6372 and we can order these bowls for you.
That said, I've included a few different 20 oz bowls (not part of the Signature collection and not all Vertex) for your consideration.
Answered on 2/12/2013 by Andrew Call from Boulder, CO