Multiple plants in one container?

Is it possible to grow multiple plants in one container or will they kill each other? I was going to try to take a couple of clones, but I don't have room for more pots in my little grow closet. If I didn't let them get too big, would it be okay to have maybe 2 or 3 little plants in one pot?

Thanks guys!

Yeah you can do. I have been putting two plants in each pot my last 3 grows. I usually keep the better of the two after they have grown long enough to allow me to make that decision. My last grow I budded two plants in one pot. You just have to water and feed a little bit more often. They wont "kill" each other. May not be "optimum" conditions but it is certainly doable and will work.