With electronical type thingies and electrical power : O
What kind? Rail gun style where a huge current causes an electromagnetic field perpendicular to the path of electron flow or gauss gun style where a building magnetic field provides thrust to a magnetic object? Or an electro-mechanical system where some form of spring or compressed air is restrained by a catch that is operated electronically? Or an electro-chemical system in which an electrical system causes a chemical reaction such as igniting gunpowder, hydrogen or a rocket propellant?
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That depends on what soda cans like to eat for lunch.
Look at a tennis ball launcher. Not exactly portable, but it should launch a soda can pretty far.