Slim, durable and stackable, these trays fit snugly in your oven and pantry, freeing up space while expanding your culinary possibilities. Special Features Freezer Safe, Nonstick, Oven Safe. Oven safe up to high temperatures: Safe to use in ovens up to 230°C (450°F, Gas Mark 8), making them perfect for roasting, tray bakes, and reheating.