Bumpbrella One of the worst things about rainy days is bumping into other umbrellas on the sidewalk. Instead of ducking for cover, the Bumpbrella concept makes perfect sense. The Bumpbrella from RKS Design is inflated by an internal bicycle pump. The umbrella is completely see-through, allowing you to spot who or what's in front of you. It also contains three bright LEDs, so you can be seen in the rain at night. Turn the handle backwards, and it will deflate.