How can I build a Lego Soda Machine that uses a wood ramp and linear motion to push the cans out?

I am building a soda machine for tech fair and i need to know how it build it. I have holders for 3 cans of soda to sit in vertically. I am using linear motion to push one can at a time out on to the ramp. After the can rolls down the ramp, my group would want to have something to stand the can up-right. What should I use?How can I build a Lego Soda Machine that uses a wood ramp and linear motion to push the cans out?have it fall off the ramp into a tube or something of that nature to correct it final fall,but with true vending designs the can always comes out on its side ,that's because its easier to get outHow can I build a Lego Soda Machine that uses a wood ramp and linear motion to push the cans out?use a spring