RCW 70.345.110: Coupons for free of charge products.

(1) No person may give or distribute vapor products to a person free of charge by coupon, unless the vapor product was provided to the person as a contingency of prior or the same purchase as part of an in-person transaction or delivery sale.

(2) This section does not prohibit the use of coupons to receive a discount on a vapor product as part of an in-person transaction or delivery sale.