Standard cassettes, unless otherwise noted. Most commercial tape cartridges, unless otherwise noted. Not a disc, cylinder, or tape. Most instantaneous discs are acetate, wax, or aluminum. Most commercial or mass-produced cylinders are plastic.
Most instantaneous cylinders are wax.
Compact digital discs are made of a thin layer of aluminum coated with plastic. Use also for acetate. Use also for aluminum. Item is other than a disc or cylinder. All cylinders and some early discs.