Vintage 1970's Doritos sleeping bag in good condition

How many proof-of-purchases did it take to get this Frito-Laysleeping bag?! Cool and fun 1970's era (my guess) Doritos sleeping bagperfect for the hipster reliving their childhood! It's in good condition with one small spot which is pictured. The inside is a soft yellow fabric, the whole thing is nylon. The bag measures 62" x 30" zipped up, and it unzips to lay flat like a blanket too. Complete with little black cords to tie it up neat for your next slumber party.