Free Sample of Nabisco Rice Thins November 13, 2013 at 8:29 pm By coupongeek You can sign-up for a Free Sample of Nabisco Rice Thins on the Walmart site. (Be sure to click on the “Get Sample” link.) Thanks, Coupon Pro! These are a gluten-free snack. Great way to try them without wasting your money if you don’t like them!