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Start with 1 tbsp (15mL) honey. Microwave it for about 20 seconds, until the honey is mostly liquid. This makes it easy and fast to mix in the sugar. Exfoliation should only take a few seconds, but the scrub can also moisturize your lips and soothe cracks and sores. An old eyeshadow or lip balm case will work perfectly, although sterilizing is recommended to avoid germs. Depending on how fresh your oil was, this usually lasts about one or two weeks in the fridge before it becomes moldy or rancid.  If the honey crystallizes, just place the container in a shallow bowl of hot tap water until the honey melts. Honey is a natural preservative, making this safer than most homemade scrubs. It is much less effective when diluted, so don't expect an oil-heavy recipe to last too long.

Summary:
Microwave a spoonful of honey. Leave on for up to two minutes. Store the rest of the lip scrub.