My money would be on starting a kickstarter or something like that with a few niche markets. The pillow case idea is a simple one as are camping/travel outlets. This will give you proof that your product can sell.

Next step really depends on whether you want to get involved in ongoing manufacturing and marketing, or work more in the background by licensing your technology to others.

Glad to hear that you have patent pending on this too - the last thing you want is to license your product to someone and then have them copy it and move you out.

Good luck with it.