Fill with water and allow to stand overnight. Drink first thing in the morning. Use only with plain water. Do not add fruits or lemon. Do not drink water that has been in the flask for more than 10 hours. To clean: Fill with 2 cups warm water, fresh lemon juice from 1/2 a lemon and 2 tablespoon salt. Close lid, shake well, then empty. Rinse well with tap water and allow to dry.
