$15 price breakdown
The following is the price breakdown of the Hoodie Viral Helmet. It can actually be built for about $9.
about $1 for the 3D printed part (based on PETG filament cost and electricity)
the rubber bands and screws are optional, so $0. If purchased, they are under 20 cents each.
NOTE: If you just want to build one unit, you won't be able to make it for $15. This is largely because of shipping costs and that many parts can't be bought in qty1. You often have to buy a bulk pack of 50 or 100. A few items can be bought individually.
If you want to build 10 or more, please contact us. We can help with sourcing parts in smaller quantities. We coordinate makers who might want to split orders.