The term "cold storage box" refers to a container used for preserving items at low temperatures. However, there are several synonyms for this phrase that may be used in place of "cold storage box." For example, one alternative term is "refrigeration unit," which highlights the item's purpose of keeping things cool. Another term that may be used is "icebox," which harkens back to earlier times before electric refrigerators were common. Other synonyms include "cool box," "freezer box," and "chill chest." Ultimately, using different terms can help to add variety and clarity to written or spoken communication.