Hello Subscription » Black Friday Subscription Box Deals & Coupons » Sliime Cyber Monday 2017 Deal: Save 40% Off First Box!! Sliime Cyber Monday 2017 Deal: Save 40% Off First Box!! Make the first comment!By Hello Subscription. Last updated November 27, 2017. Hello Subscription independently researches and reviews the best subscriptions and products. Things you buy through our links may earn us a commission. Save for LaterGo to commentsNotification A monthly subscription box for Slime Lovers. Every box contains slime and goodies you will LOVE! Sliime Cyber Monday 2017 Coupons and Deals Save 40% on your first box!! Use coupon code CYBERMONDAY. Expires 11/27 Visit Sliime to get this deal! Check out all of the Cyber Monday Subscription Box Deals!