Shield that doesn't interfere with other power ups

[woompa loompa]

If I'm correct the only shield in the game is the gummy bubble. I'd like to suggest a new kind of shield instead, with these differences from the gum

- doesn't pop at the first contact with another item such as bananas
- lasts a fixed amount of time instead (a bunch of seconds)
- doesn't interfere with other gifts, meaning that I can use the shield while at same time use other power ups
- gives the kart a little bit more speed (probably not necessary, but I believe it will improve the feeling/importance of the power up)