Double Duty Solids

Kyu I need a cold drink; would you want one? Kyuta takes a TetraPak® of apple juice from the refrigerator. Gen Hey, that’s a pretty cool container! Do you know that it’s known as a Sommerville tetrahedron([9])? But most people call it a tetrapak which sounds rather familiar. It is like a household shape for many. A few decades ago, these tetrapaks were used as milk containers for school lunches. However, we seldom see them nowadays. Kyu A few days ago, I happened to see these at the store; and I bought a lot of them since I like their shape.