Double wall insulation, helps retain heat longer than single wall models. Holds up to 30 5.7 oz cups, with an approximate brewing time of one cup per minute. Green indicator light lets you know when coffee is ready to be served. Also features locking lid and stay-cool handles. NESCO(R) 30-Cup Electric Coffee Urn, Stainless Steel is one of many Coffee Makers available through Office Depot. Made by Nesco.