The Big Blaster â„¢ Confetti Cannon (U.S. Patent No. 6,364,737) How to Setup the Big Blasterâ„¢ Cannon: 1) Remove the road case lid and remove the horn (venturi), CO 2 hose, ratchet strap and 2 aluminum rods with their retaining pins. 2) Using the two aluminum rods and the retaining pins, install the horn in the base of the road case.. The confetti cannon will shoot red, white & blue confetti shaped as rectangles. This extra large confetti cannon has an average length of 12 inches. The confetti cannons are easy to use, simply hold in one hand and twist the bottom with the other. The cannons will shoot the confetti up to 15 feet in the air. "/>How to make a large confetti cannon