Reusable and eco-friendly silicone stretch food saveware. Freeze, heat, steam, store and save your food with these microwave and dishwasher safe pure silicone lids. PBA, BPS & Phthalate free. These silicone stretch lids are durable and will last for years, a green alternative that will save you time and money while no longer needing plastic food wrap. The stretch top conforms to almost any shaped container found in your kitchen and creates a vacuum seal to preserve food and prolong freshness. 6 size set.