Cup Questions

Imagine you are looking inside my cup. You see some ice, a straw, and three rather out-of-place semi-circled rods permanently stucked along the sides of the cup.

Make a guess:

• What are those out-of-place semi-circled rods for?
• What functions do you think they serve?
• You do not see them in your regular cups don't you? Are they redundant features?

Hints:

• If you wash a few cups how do you dry them?
• Is it possible to stack-em up and yet allow the cups to dry?