Designed with stretchy silicone, these food saver pods create an air-tight seal to preserve your produce longer and prevent browning. Great for lunches, leftovers and travel. Stretchy silicone with airtight seal prevents browning - See-through design - Eco-friendly & reusable - Dishwasher safe. Slide (green) or twist (yellow, red) to open /close. Red fits, apples, tomatoes, onions, etc Yellow fits lemons, limes, garlic and more, Green fits pears and avocado.