How to Reheat Leftovers Safely in Glass Containers

Quick answer

Glass containers are a safe, non-staining choice for reheating leftovers in the microwave, as long as you avoid sudden temperature changes and use microwave-safe lids.

Steps to reheat leftovers safely in glass containers

1. 1. Check the container for microwave safety: Ensure your glass container is labeled microwave-safe. Most glass food storage containers, including Pyrex and Snapware, are microwave-safe, but avoid any with metal trim or lids that are not microwave-safe. If the container is cold from the fridge, let it sit at room temperature for a few minutes before microwaving to reduce thermal shock risk.
2. 2. Vent or remove the lid: Always loosen or remove the lid before microwaving to allow steam to escape. A sealed lid can cause pressure buildup and lead to the lid popping off or the container cracking. Use a microwave-safe cover or paper towel to prevent splatters while still allowing steam to vent.
3. 3. Heat in short intervals and stir: Microwave food in 1- to 2-minute intervals, stirring in between to ensure even heating. This prevents hot spots that can cause food to burn or the container to overheat unevenly. Check the internal temperature with a food thermometer; leftovers should reach 165°F (74°C) for safe consumption.
4. 4. Handle with care after heating: Glass containers get very hot in the microwave. Use oven mitts or a towel to remove the container. Place it on a dry, heat-safe surface—not a cold countertop—to avoid thermal shock. Let the container cool for a minute before opening the lid to avoid steam burns.

Product facts

• Snapware® MealBox™ 4-cup Divided Glass Storage Container with Lid: This Snapware® MealBox™ 4-cup Divided Glass Storage Container with Lid is made from glass for durable, non-staining storage. Glass won't stain or retain odors from saucy leftovers, and the divided design lets you reheat two foods together without mixing flavors.

  

• Snapware® Total Solution® 3-cup Plastic Food Storage Container with Lid: This container is compatible with Snapware® Total Solution® lids and is designed for airtight, leak-proof storage. A secure lid prevents splatters during reheating, but always vent the lid or remove it to avoid pressure buildup in the microwave.