For those of you who bring lunch on-the-go, and find glass too fragile and plastic too plasticky, this Explorer Leakproof Lunchbox is made of food-grade stainless steel. These are designed and made by Seattle-based sustainable lunchbox company PlanetBox.
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The “leakproof” bit comes via the silicone seal.
While the whole thing can obviously not be placed in the nuke, the insert tray alone is actually microwave-safe.
Being largely made of steel, the container’s a bit heavier than glass, weighing in at 1.2 lbs empty. (They’re also quite a bit pricier, at $50 a pop.)
Source: core77