Getting peanut butter out of a jar is no problem -...  ...ay to the top. But everything about the design is food -safe, and since the food is exposed to less air over time, it will stay fr...

John Spevacek is a chemical engineer with a confes...  ...Here's how the project came about. I was in the Packaging Films Group, making multilayer polypropylene film...  ...Group, making multilayer polypropylene films for food packaging . The film had a heat-seal adhesive on one side of...