I get the monthly newsletter from HEB, which this month actually included a link to the website for a coupon for B1G1Free chips. This was not a yellow coupon, it is actually from the website and it is a bricks/coupons.com coupon.

Buy one HEB Wavy Potato Chips (Fake Wavy Ruffles), get one HEB Nacho Cheese Chips (Fake Doritos) for free.

Price of HEB Wavy Chips = $2.00
Price of HEB Nacho Cheese Chips = $1.99
Two bags of chips for $2.00.

Not as good as some chip deals at Randalls or elsewhere, but not bad for HEB.

I think this may be the link: HEB coupons