Cup Sets from Skylighter.com http://www.skylighter.com/ Pyrotechnic Supplies shipped everywhere in the US including end caps, wood plugs, paper end plugs, cup sets, mortar plugs and fireworks caps. Cup Sets, 3/4 Inch http://www.skylighter.com/mall/product-details.asp?id=288 Cup Sets, 3/4 Inch.<br /> Cup Sets, 1 Inch http://www.skylighter.com/mall/product-details.asp?id=290 Cup Sets, 1 Inch.