nutrifresh™ 1.4L glass vacuum food storage container with air tight click lock lid lets you enjoy the convenience and benefits of storing pre-made meals, preserving leftovers, controlling portion sizes and simplifying reheating. The in a vacuum sealed environment, preserves food up to 3-5 times longer. They are great for storing foods or other items in the refrigerator, or freezer. The glass containers are dishwasher safe, oven and microwave safe (without lids). Use the glass containers to cook meals in the oven (without lid), or reheat your left over in the microwave (without lid).