A clear glass snack or luncheon tray, likely a vintage piece of Depression glass, specifically identified as a Hazel Atlas Lunch Snack Tray, possibly from their Orchard Crystal pattern.
Commonly used for serving individual meals or snacks, often featuring a divided design for food and a designated spot for a cup or even an ashtray, as seen in the "Sip & Smoke" sets.
Note that while durable, it may not be suitable for modern uses like microwaves or dishwashers, and uneven heating can cause breakage.