Sliime Coupon: Get 30% Off Subscription – TODAY ONLY! Last updated by Hello Subscription on December 3, 2018. Holiday Subscription Box Deals & Doorbusters / Subscription Box Coupons & Deals / Sliime Coupons / Best Holiday Subscription Box Deals Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification It’s the Cratejoy 12 Days of Christmas Sale! Sliime: 33% off on all subscription orders! TODAY ONLY with coupon code 12DAYSGIVING! A monthly subscription box for Slime Lovers. Every box contains slime and goodies you will LOVE! Visit Sliime to get this deal!