Dierbergs Super Secret Thursday Coupon January 28th The links in the post below may be affiliate links. Read the Full DisclosureJanuary 28, 2016 by Kim Julian This weeks Dierbergs super secret coupon gives you Ronnoco Coffee for $4.99 (Retail $8.99). The coupon is good all day. Mention the store # 268 at checkout or print the coupon.