Since 1982, Presso has been used in homes all over the world. Now, Bodum has introduced an improved line of storage products, using advanced materials to make them more useful. The new Presso collection is made from silicone and borosilicate glass and can resist extremely high temperatures. The jar itself, except the lid, is microwave safe. Consumers can store any kind of product, from very hot liquids to liquids with a high acid level, without discoloration. Presso is made of fully recyclable materials.