[Q]: Objective: To use a metal material for bike tire grips that doesn't require a layer to protect the inner tube from puncturing.
[A]: Use flat back rivets as grips.

[Q]: Objective: how to hold nails to make them easily accessable
[A]: Put a magnet on to hold nails

[Q]: Objective: how do you pay for a city bus fare?
[A]: put change into the coin machine or bills into the dollar slot.

[Q]: Objective: To prepare the side panels of bottle holder,
[A]:
use a pencil to mark the panel and cut with a saw.