Where can you purchase a very large Pyrex mixing bowl?
How large? Amazon, Overstock.com, Bed, Bath and Beyond all sell
Pyrex and you may find what you need on their web site. Or you
could Google Pyrex (made by Corning) for other retailers. Pyrex is
a special tempered glass that can withstand a lot of heat, so it is
used for cooking. Pyrex brand also makes measuring cups, etc out of
glass and some of them are tempered and some are not. But, a mixing
bowl like you are talking about does not need to withstand the heat
of the oven or stovetop so any brand will be just as good as Pyrex
for mixing in. Try E-bay. Also, type in Pyrex. I noticed Craig's
list sells them too.