Fastifier approved items to add to your water include MIO in very small amounts, a small amount of citrus to infuse in your water. Lemon/lime juice. You can also use berries/cucumbers to INFUSE flavors. You can also use ONE tea bag for the taste to diffuse in the water. You CANNOT use crystal light. You cannot sweeten with any kind of sweetener (Splenda, etc…)(Remember during fasting hours only water is approved)