The patented valve forces air out, then locks the lid in place While the top lid is clear, to easily see your content amount, the Airscape lid will not allow harmful ultra-violet light to reach the contents Made from restaurant-grade, 18/8 stainless steel with an enamel paint finish Durable construction resists staining as well as odor and taste transfer – perfect for food storage Hand-wash recommended AIRSCAPE KILO Most food storage canisters are “airtight”, which means they lock air in with the contents. The Airscape forces the freshness-destroying air out of the canister, extending the life of your coffee, tea, flour, sugar, cereal, seeds, herbs, nuts, pet food or any perishable goods, to keep what’s good today, good tomorrow too! Designed of durable galvanized steel, the Airscape Kilo canister body resists staining and odour retention. The BPA-free clear, top lid allows you to see how much is left in the container, and the inner Airscape lid (also BPA-free) makes a fun “swooshing” noise as its pushed down, so you can actually hear it working. The Airscape Kilo comes in three beautiful & modern matte painted finishes and is 100% food-safe, lead-free and non-toxic.