Review on Compact Waterproof Kerosene Lighter - Mini EDC Gear, Ultra-Small Size 2.5cm/φ 🔥 1.3cm, Portable Metal Capsule Lighter, Peanut-sized Design (Fuel not included), Pack of 3 by Mary Cornett

Im impressed. I've used Zippo lighter fluid with good results. The o-rings appear to be working well as it has been over a month (storage, not much use) and the fuel has not evaporated. This is important to me as I believe it is a backup tool and not an everyday use item. However, they seem to be built well enough for everyday use. The wick can be adjusted (with needle nose pliers or strong pliers) to the size of the flame. They are not windproof like a large lighter (with a shield/chimney), but they don't go out as easily either. If dropped (which is easy with these tiny items) they usually stay aflame, so some care is needed to avoid setting the rug on fire.