Thermacell Portable Mosquito Repeller – Link

Amazon has this marked down to $18.69.

• New and Improved No-Spray Repellent – Enjoy the outdoors with a DEET-free, scent-free mosquito repellent that has no chemical-to-skin contact; no unwanted smells or stickiness and no mess of sprays
• Lightweight and Portable – The Thermacell Mosquito Repeller is lightweight and portable, making its invisible 15-foot zone of protection mobile and convenient, providing 12 hours of comfort outdoors
• Ideal choice of Mosquito Protection – Perfect for campers, fishermen, hunters, boaters and lovers of the outdoors who do not want the nuisance of mosquitoes; no open flame provides peace of mind
• Attractive Design – Olive green exterior gives a sleek and stylish appearance that blends in with surroundings, making the portable MR300 a great addition to any camping, hunting or fishing trip
• Hassle-Free and Easy to Operate – The Portable Mosquito Repeller comes with a switch on the front to turn it on and a button to start the heat source, a simple way to keep the mosquitoes away