Board Thread:General Nerf discussion/@comment-28773666-20160821193101/@comment-27103116-20160908175346

I did the math, and creating a funnel that would hold roughly 100 RIVAL rounds would require it to have a 7-inch diameter and a 3-inch depth, with one HIR having a volume of .318 inches cubed.

https://www.google.com/shopping/product/9447007703772332610?lsf=seller:100446302,rt:2&prds=oid:14223691835431211891&q=7-inch+diameter+funnel&hl=en&ei=E6XRV_-LMoGAjwPI_rPoCQ&lsft=gclid:CjwKEAjwmMS-BRCm5dn51JLbp1wSJACc61tFM9ld6mLvz6bOpjR7WKVQnYqEoouqP8ST4CChv4_CpRoC1lDw_wcB

Here's one that matches.