The Nesco 50-Cup Coffee Urn is constructed of stainless steel and features double wall insulation, allowing it to retain heat longer than single wall models. It's hefty capacity can hold up to 50-5.8 Oz. cups. Approximate brewing time is one cup per minute. Green indicator light lets you know when coffee is ready to be served. With locking lid and stay-cool handles to help prevent mishaps, this urn is truly a crowd pleaser.