What can i use to protect my camera

im going to film a video and i want to use soda in it but im afraid it will get on the camera

Put Screen covers on the lens and the screen.(If your cam has one.)
Also Buy a case.
If you really dont want that soda on your camera just put it in a bag with a little hole in it for the lens.

For some camera's they make water proof/resistant shell's for camera's. Best thing to do is call around to electronic store's and camera stores, or even the camera manufacturer for a case. A water proof/resistant case is a better way of going instead of making one of your own. Each case is vigorously tested for leak's before it leaves the factory.

you put a protective cover on it

common sense!