In a large pot over medium heat, warm the apple cider. Add sugar. Continue to heat and stir until the sugar is completely dissolved. Add in strawberries, and allow to simmer until the strawberries are soft and mushy. Now comes the tricky part; begin straining the mixture through a series of stainless steel mesh screens. Start with a larger sized mesh, working down. You can strain shrub as little or as much as you want; for a relatively clear liquid strain through a coffee filter in the last stage. We prefer to leave some of the pulp in the shrub, but it is truly optional on your part. Shrub can be stored (without refrigeration) for up to a year. For best results, heat up after straining and pour warm into mason jars; seal and store in a cool, dry place such as your storage pantry.