

Frego Award-Winning Plastic-Free Glass and Silicone Food Container: With a thick silicone casing and lid container, this model might be practically indestructible.Also, we found it nearly impossible to clean the cranny at the seam that also trapped dirt and debris. OXO Good Grips Prep & Go 3.3 Cups: This leak-proof model, the only opaque plastic one, was let down by very slight staining and odor retention.However, it leaked one singular drop after 15 minutes on its side-and also its plastic lid held onto just the faintest whiff of turmeric. OXO Good Grips 3.5 Cup Smart Seal Glass Rectangle Food Storage Container: This was in many ways a similar design to the Glasslock and performed almost as well.Cleanup Tests: Over the course of testing, we evaluated how easy each container was to hand-wash with warm, soapy water and a sponge.Microwave Test: We microwaved 1-cup of frozen peas in each of our favorite containers, lids ajar, documenting warping (if any).We saw how well the containers stacked on the countertop, and then did the same in the refrigerator. Design Test: With each of our favorite containers, we removed the lid and opened and closed the latches (if applicable) 25 times.Durability Test: We dropped each container on a marble stone surface five times, noting any damage.After four hours, we washed them thoroughly with hot, soapy water and a sponge, allowed them to dry, and then noted any visible staining or lingering odors. Stain and Smell Test: We smeared the insides of each container and lid with a mixture of vegetable oil and turmeric.Then, each container was left on its side sitting on fresh paper towels (if it leaked) for 15 minutes. Then, we shook each container with the long side pointing down at the paper towels 10 times, rotated them 45 degrees and shook 10 more times, and repeated this rotating and shaking twice more. Leakage Test: We filled each container with 1-cup of blue-dyed water and lined half sheet trays with paper towels.We designed tests (like the one shown here) to evaluate this criteria. Our favorite containers had to be leak-proof, easy to use, and resist staining.
