Might be worth discussing with class.

A very interesting design case, and addresses an important issue for (some) shoppers. (Probably mostly introverts.)

An interesting thinking exercise. Ask students the question as posed in the title. The critical thinking part is: question the assumptions baked into the title. And see how many students can explain the physics.

Example of how expending a little extra energy creates two more useful outputs (compostable solids, and "cleaner" greywater) as well as lowering sewage system maintenance needs. Possibly, an example of how TRIZ "separation" principle can be applied.