You can buy this exact kit from Raw or if you have a 3D printer you can just make it yourself. They work great to prefill prerolled empty raw cones. I have printed this project many times. If you have a head shop - print them and give them away to customers or sell them really cheap to get some buzz. Slap a stick on it and your off to the races. Comes out nice 
https://cults3d.com/en/3d-model/home/cone-loader
https://cults3d.com/en/3d-model/home/cone-loader
