My full size custom proton pack I made to complete my costume. Got it as close as I could with what I had. Plan on adding some sound effects at some point. :
Amazon.com: Kids Ghostbusters Proton Pack for Halloween Costume, Ghostbusters Proton Pack Backpack for Dress Up Standard : Toys & Games
Amazon.com: Fun Costumes Deluxe Ghostbusters Proton Pack Replica Prop, Authentic Ghostbusters Costume Accessory & Collectible for Cosplay Standard : Clothing, Shoes & Jewelry
New life-size Ghostbusters Proton Pack from Halloween Costumes | UNBOXING + COMPARISON - YouTube
Ghostbuster Toddler Proton Pack
DIY Ghostbusters Proton Pack Made From Cheap and Easy To Find Materials. Proton Pack Template!! - YouTube