Well, if you want a Waterproof Fire Capsule bigger and more durable, something that you may use daily to light a camp fire, that's how I do it.
Firstly, you need for a straw, some cotton wool, and Petroleum Jelly. Again, pliers and lighter
Second: cut 2 inches (5 centimeters) piece of the straw
Third: take a pinch of cotton wool. Using a toothpick, soak the cotton wool in the Petroleum Jelly
Fourth: insert the soaked cotton wool in the straw piece (use the toothpick to help)
Fifth: clean from the surplus Petroleum Jelly
Sixth: hold tight an extremities of the straw piece using pliers, then burn the extremity until is sealed (use the lighter). Do the same for the opposite extremity.
The Fire Capsule is made ...
From a standard straw (I found them in Cafè Bar), I made five capsules
The Fire Capsules are waterproof
I take them in my Emergency Kit
The Waterproof Fire Capsule is easy to be ignited, by lighter (of course) and Firesteel sparks too
Cut one capsule extremity, and squeeze. The soaked cotton wool go out easily
Just rub a bit the cotton wool, to enlarge fibres
Now use the firesteel to ignite the soaked cotton wool,
The cotton wool will burn for 2 minutes or more. See the video here...
Enjoy your Bushcraft!