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What's New, What's Hot is Travel Weekly's look at useful and fun travel gadgets, edited by Joe Rosen. First up, the Nima Peanut Sensor. A possible life saver for travelers with peanut allergies, this portable device employs antibody-based chemistry to detect the presence of peanuts in food in under five minutes. The company also markets a gluten detector.

This well-designed, weather-resistant Keysmart Urban 21 Backpack has the business traveler in mind, what with a waterproof front pocket, a padded laptop pocket, a slide-on sleeve for easy toting aboard wheeled luggage, and an anti-theft RFID-blocking pocket lined with microfleece.

With warm weather sports and leisure activities on the horizon, this is the time of year to get your prescription sunglass needs in order. And a great place to do that is with SportRx, a San Diego-based specialist in providing custom prescription sunglasses and goggles (including prescription wrap-arounds) since 1996.

French luggage brand Delsey has come up with something new in Pluggage, a line of "smart" bags that puts technology to practical use. The bags feature an integrated digital scale located on the side handle that verifies that the bag's weight complies with specific airline requirements; digital fingerprint unlocking (or three-digit combination); and a movement indicator that notifies travelers when a bag moves 10 to 65 feet away or arrives on a luggage carousel.

From William Roam comes a 15-piece Sense Cosmetics Travel collection of hair- and body-care products featuring Tamarack Larch Tree Extract from Minnesota. There are no parabens, phthalates or synthetic fragrances in the moisturizers, vegetable-based soaps and other toiletries, which come in a ditty bag and include shampoo, conditioner, shower gel, body lotion, aloe soap, a dental kit and bath salts.