One-piece, seamless double-wall polyethylene with thick foam insulation CFC-free insulation protects hot or cold for 4+ hours, without electricity Drip-proof recessed spigot for easy self-serve access Sturdy nylon plastic latches open and close easily for quick access, and secures the lid tightly for safe transportation Rotomoulded for maximum durability UC250 and UC500 inter-stack securely for safe transport Vent cap to equalise internal pressure and check the temperature Moulded-in ergonomic handles for safe transport Self-adhesive beverage label set with each unit Rust, crack, and chip resistant Warranty 1 year back to base parts and labour