Glass Food Storage Containers
How we tested
Many consumers have decided to avoid plastic storage containers after learning about the possible ill effects of microwaving in plastic, leading to the resurgence of glass food storage. We chose three and ran them through the same tests as our plastic containers (with the exception of dropping them onto the floor). Two were oven-safe, but other design flaws knocked them out of the running. A third aced all our tests, and was equal to the top-ranked plastic containers. If it weren’t considerably heavier and more prone to breakage, we’d consider choosing glass as our favorite storage container.
We tested eight BPA-free plastic (according to manufacturers) food storage containers, choosing square or rectangular sizes as close as possible to 8-cup capacity. All were purchased online or in Boston-area retail stores.
We filled the containers with chicken noodle soup and shook them vigorously for 15 seconds, then filled them with sugar and pie weights and submerged them in water for two minutes. Containers that didn’t leak in the soup test and that kept their contents dry when submerged received high marks.
We refrigerated oil-packed tuna in each container for three days, then ran containers through a home dishwasher and checked for odors.
We filled containers with chili, froze them, and reheated them in the microwave, checking for warping, staining, and plastic flavors or odors.
After testing, including 50 cycles in a home dishwasher, we observed stains, warping, and wear and tear; then we froze water in the containers.
We considered features that made the containers easier to use, including simple, intuitive seals or efficient shapes.