The Mentos Geyser Tube ($5) is a small clear tube that will help you maximize the effect of the best backyard science experiment ever discovered. Just load the Mentos into the tube, lock it onto your 2-liter of Coke (diet works best), pull the pin and run like hell. The little tube will more than double the normal distance of the soda blast ¡ª be prepared for your fructose fountain to reach 30 feet or more.

It always seems like no matter how hard you plan for an outdoor trip, weather always turns out to be factor in your activities. And when you're out in the middle of nowhere, you can't just turn on the Weather Channel to see what's going on. Luckily, Brunton's ADC Pro ($180) is here to help. The tiny device gathers and records all the key weather conditions for you, including temperature, barometric pressure, relative humidity, heat index, air density, wind speed, wind chill, dew point, wet bulb, and more. With all of this info, the gadget then predicts the coming 12 hour's weather.

Wide-mouth plastic water bottles are a common sight during outdoor adventures, and so are lanterns ¡ª but this is the first time we've seen them brought together. The Firefly by Guyot Designs ($22) is an ingenious little device that attaches to the mouth of your water bottle and uses an integrated LED to turn your bottle into a glowing lantern. Luckily, should you have an encounter with any hostile wildlife, the brightness is adjustable.