Abstract: A worm cooler apparatus includes a removable and replaceable bottom lid assembly which includes a first connector and which includes an interior chamber adapted for receiving a quantity of coolant material. A tubular container assembly includes a second connector, is adapted for connection with the first connector, and includes a third connector. A removable and replaceable top lid assembly includes a fourth connector which is adapted for connection with the third connector. Preferably, the first connector is a first threaded portion and the second connector is a second threaded portion complementary to the first threaded portion. Also, the third connector is a third threaded portion, and the fourth connector is a fourth threaded portion complementary to the third threaded portion. The quantity of coolant material is in a form of a sealed coolant assembly which contains ethylene-glycol-based coolant. An insulation jacket assembly encompasses an outer portion of the container assembly.