Woot offers Farm Innovators CC-2 Cord Connect Water-Tight Outdoor Lawn/Garden Power Tool Extension Cord Lock, Fits 12- to 18-Gauge Cords for $6.99. Free shipping for Prime Members.

Product Description:
Never worry about your hard-to-reach cords disconnecting or being exposed to the elements. Use this handy cord lock for outdoor lighting projects, on the farm, around your hot tub, anywhere you need secure water protection for your power. The patented interlocking clamshell design enables you to simply close the covers around each end of the cord. Next, twist together to create a water-tight seal for your outdoor power connection.

• KEEP CORDS TOGETHER: Prevent your extension cords from disconnect when you need the most
• SNAP TOGETHER: Plastic connector snaps together to prevent cords from separating; Material: Plastic; Color: Green; Dimensions (L x W x H): 5.5 x 2.25 x 5.75 inches; Weight: 0.25 pounds
• WATER TIGHT: Twist-together design creates a watertight seal with a rating of IPX1 - IPX6, ideal for use outdoors
• WORKS WITH MOST CORDS: Compatible with 18-, 16-, 14-, and 12-gauge extension cords
• GREAT FOR OUTDOOR TOOLS: Perfect for electric landscaping equipment, holiday lighting, power tools, and more
• Tapered ends and interlocking structure create a secure covering for cord connections
• Snap together design makes removing cords quick and easy
• Certified to a watertight rating of IPX1-IPX5
• Engineered to withstand rain, drips, spray or any other liquid exposure (not submergible)