PupBox Cinco de Mayo Coupon: Get Your First Box For Just $5! Posted by Hello Subscription on May 4, 2019. Subscription Box Coupons & Deals / PupBox Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Check out this PupBox coupon for Cinco de Mayo! Get your first box for just $5 with coupon code CINCO. Valid on any 3, 6, or 12 month subscriptions. Get your first Pupbox for just $5! See our past PupBox reviews to find out more about this subscription! Visit PupBox to grab the deal!