Amazon offers the Totu Liquid Silicone Gel Rubber Shockproof Case for iPhone 7 / 8 in Black for $12.99. Coupon code "VPN2T9NI" cuts that to $3.99. Plus, Prime members bag free shipping. That's $9 off and the lowest price we could find .

Note: It's also available for iPhone 7 Plus / 8 Plus in Blue for $3.99, via the above coupon. Plus, Prime members bag free shipping. That's the best price we could find by $18. Both deals end March 31.