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 Dustin Mitchell

This is EXACTLY what I was looking for. A truly tiny and unobtrusive lighter that takes up virtually no space on your keychain. It's lightweight so you can feel it when you use it. Well built and doesn't feel cheap like breaking it. However, it takes a few hits to make it glow. Although I haven't managed to light it up yet, it usually lasts 4-5 puffs. I've had it on my keychain for a few weeks now and just fired it up so the o-ring seems to be holding the fuel very well. This is NOT for everyday use. They will drive you crazy trying to light cigarettes, candles or whatever every day and you have to refill them every day. This is for those of us who are paranoid and want peace of mind that we can always start a fire in an emergency. I can't say more, if you're looking for a truly tiny lighter then this is the holy grail.