Conserve-O-Gram 11/04 Storage Containers and Labels for Fluid-Preserved Collections Conserve-O-Gram 11/04 Storage Containers and Labels for Fluid-Preserved Collections Source: National Park Service (NPS) Information for choosing containers, closures, tags, and labels for fluid-preserved speciment collections. Handling & Transport, Hazardous Materials, Identification, Natural History Specimens, Storage & Housing