Intex Twin Air Mattress Only $7.97 (Reg. $15.97)! July 2, 2018 by Coupon Caroline Leave a Comment This post may contain affiliate links or sponsored content. See Disclosure Policy. Have company coming this summer? Head to Walmart and grab the Intex Twin Downy Inflatable Air Mattress for only $7.97 (Reg. $15.97)! This would be great for camping too!