Ontario Food Handler Certification Practice Exam 2025 - Free Food Handler Certification Practice Questions and Study Guide

Storing leftover food in airtight containers in the refrigerator is the best practice because it helps to minimize the growth of bacteria and other pathogens that can cause foodborne illnesses. Refrigeration slows down the growth of these microorganisms, thereby extending the shelf life of the food. Airtight containers also prevent the food from coming into contact with moisture and odors from other foods, which can lead to spoilage and compromise food quality.

Using aluminum foil, while it may provide some protection, does not create a sealed environment that is effective against bacteria growth. Leaving food uncovered exposes it to contamination and can lead to rapid spoilage, especially if the food is stored in a pantry where temperatures can fluctuate. Storing food in plastic bags at room temperature can accelerate bacterial growth, especially for perishable items, and does not allow for proper long-term storage. Therefore, the use of airtight containers in the refrigerator effectively balances safety, quality, and longevity of leftover food.