Merchant & Mills Pure Beeswax
Pure beeeswax potted with a lid. Ideal for needle threading and 3 million other uses.
Beeswax is traditionally used by tailors to strengthen thread when hand sewing buttonholes. Keep it by the sewing machine and pull your thread across it a couple of times before snipping off the thread end and it will be as easy as pie to get the stiff neat end through the machine needle.