A flameless and nonelectric insulated steam source. The steam source may be operated within a garment bag to refresh and remove wrinkles from an article of clothing. Hydrating an exothermic compound produces steam. An insulator within the steam source allows the pouch to be handled and prevents damage to the garment bag and the surroundings when using compounds with high thermal output. Single-use garment bags employ integrated steam sources to streamline garment steaming. A garment bag can be designed to optimize the benefit to garments when using the steam source.