Dice the fresh pineapple into small pieces.

In a medium mixing bowl, combine the diced pineapple and sugar. Stir well.

Cover the bowl and let it sit at room temperature for about 1-2 hours.

Add the apple cider vinegar and water to the pineapple mixture.

Mix everything together thoroughly.

Using a strainer or cheesecloth, strain the mixture into a clean glass jar or bottle.

Seal the jar and place it in the refrigerator for at least 3 days.

After infusion, serve as desired.