Unfortunately, our coupon codes will not work with subscription products since they're already on sale and you receive free shipping as well.
Also, if you are purchasing a bundled items (our Duo bundles), promo codes do not work with them as well since these products are already discounted.
Another reason your coupon code might not be working at this time is because you've used it before or the promotion has expired.
If none of these issues are applicable to you, please contact a customer service agent.