A water bottle cap system combination that can be used with wide mouth water bottles or mason jars. The water bottle cap system includes a large cap portion and a small cap portion, which are coupled by a flexible strap. The small cap portion can be screwed onto the spout of the large cap portion, which is screwed onto the water bottle or mason jar. The small cap portion can be unscrewed from the spout and temporarily attached to the strap so that the small cap portion is out of the way of the spout, but still attached to the water bottle cap system, during drinking or pouring from the water bottle.