What features should I look for in a small bike tire pump to ensure it is portable and efficient for inflating my tires on the go?

When looking for a small bike tire pump for on-the-go use, consider features like compact size, lightweight design, a built-in pressure gauge, compatibility with both Presta and Schrader valves, and a sturdy construction for durability. These features will ensure portability and efficiency in inflating your tires while cycling.