When your cucumber’s looking a little too shiny or your water smells “off” — it’s time to grab the GreenTest ECO 6. One gadget, three functions: measures nitrate levels in fruits, veggies, and meats, checks for radiation (gamma and beta), and tells you how clean your water is. Lightweight, waterproof, with a touch screen and two probes, it speaks English and French. Not just a device — your personal health bodyguard.