A plurality of pouch bodies (14, 16, 18) are supported side-by-side from an assembly that includes a manifold block (26). The manifold block (26) includes an inlet manifold (28) and an outlet manifold (30). A liquid coolant (e.g. water) is delivered into the inlet manifold (28) via an inlet fitting (32). The liquid flows from the inlet manifold (28) into and through inlet passageways (36) which connect the inlet manifold (28) with inlet fittings (22) leading into a common end of the pouch bodies (14, 16, 18). The cooling liquid flows into the pouch bodies (14, 16, 18) and through them to outlet fittings (24) at the opposite ends of the pouch bodies (14, 16, 18). The coolant flows from the outlet fittings (24) through outlet conduits (38) to and into the outlet manifold (30). The coolant flows from outlet manifold 30 out through an outlet port (34). Electronic components to be cooled are placed between the pouch bodies (14, 16, 18).