Birchbox Grooming Coupon: Get Your First Box 50% Off! Last updated by Hello Subscription on August 22, 2019. Subscription Box Coupons & Deals / Birchbox Man Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification For a limited time, when you subscribe to Birchbox Man subscription and use this link, you’ll get your first box for just $5! Birchbox Man is $10 a month. See our reviews of Birchbox Man to learn more about this monthly grooming subscription box!