Clear Glass is far safer than plastic JARS .Many plastic Canisters contain BPA's which can seep into your food or beverages. Exposure to BPA has health effects on infants and young children .Lead free and approved by the FDA, these clear glass steel jars are a healthy alternative to toxic plastic. Ensure a quality seal with each lid?seal up freshness for long term storage! Your favorite dry foods, snacks, pasta, coffee beans, and cookies will remain fresher longer! A screw on metal lid with a rubber seal keeps your food fresher longer. Prevent your sugar from getting hard, your cookies from getting stale, and keep your flour bug free. Use these canisters! Shows exactly what these kitchen canisters hold without opening the lids and the level of supply at a glance. Warm Tips: The windows at the front of the food canisters are not air-tight, so not recommend to store flour or other powder foods.