Giwox USA offers Giwox Small Travel Umbrella in several colors (Black pictured) for $15.99. Coupon code "HC85RD4S" drops it to $9.91. Plus, Prime members bag free shipping. That's the lowest price we could find by a buck for a similar umbrella. It's wind-resistant and waterproof. Deal ends December 8.

Update: It's available in Blue and Multi for $11.99 before coupon, $7.43 after.