This week at Rite Aid, Glade PlugIns Warmers are on sale for $0.99. Use this printable coupon to get one for free!
Keep in mind that the coupon value is a penny more than the product price. For some people this can cause problems at the register. I recommend taking a copy of the store policy with you, which states that Rite Aid will accept the coupon for the value of the product, making it free.