The Bulldog Cones Reefer6. Each package contains 6 cones and ready to be filled. Each Reefer cone is 80mm of slow burning paper with a paper filter. These are easy to use. Cones are a good alternative to rolling papers because you will have consistently the perfect roll. The nice thing about cones is that they also come in various sizes, from small reefer cones made for pure joints all the way up to Giga size party style cones.