Big Blast Caps adds another level of fun to your trigger time. Big Blast Caps use regular plastic beverage bottles and turn them into a highly pressurized, reactive target. All you have to do is attach the cap to your used plastic bottle, inflate with a bike pump, and shoot! Great for bows, firearms and pellet rifles. Try using a colored liquid or powder for a great visual effect when the bottle explodes. Big Blast Caps are reusable and make plastic bottles explode to create a loud BOOM!