Lay's® Brand Wavy Greek Tzatziki Potato Chips. Partially produced with genetic engineering. When the Greeks mixed dill, garlic, and other unique spices to yogurt, tzatziki became a Mediterranean classic! There's no doubt this creamy flavor will have you saying "OPA!" Questions or comments 1-800-352-4477. Guaranteed fresh until printed date or this snack's on us. Mon-Fri 9:00AM to 4:30PM CT/email or chat at fritolay.com. ©2016 Frito-Lay, North America, Inc.