I boil mine 3 times, about 10 minutes each, pouring the "top" layer of the water off each time. You're working with 1.5 mm strands, but the extended boil will fluff them up a bit. Twist 2-4 strands together depending on the size of your coil, that should be enough. Not too tight, not too loose. Remember that bamboo will swell just as much if not a bit more than cotton when it's saturated with
juice. You can use a small darning needle to "
thread" your coil (just make sure to use something slightly fatter to wrap it, like a woodworking/drill bit!). Trim to desired length and enjoy!