Drinking water can help you lose weight, whether you're restricting your calories or not. Consuming 2 cups of water before a meal helped a group of obese adults lose 2 pounds over a 12-week period without making any other changes to their usual intake, according to a 2015 clinical study published in Obesity.
How many tea bags should you use to make a half gallon of iced tea? One gallon is about 128 ounces, so if one tea bag is good for 10 oz  of water, then about 10 teabags is good for a gallon. Start with 10  and adjust accordingly with water.
If you want a gallon, just double this recipe. In a saucepan, pour boiling water over tea bags; cover & steep 5 minutes. Remove tea bags from water, squeezing gently. Stir in 2 cups cold water & sweetener, stirring until sweetener dissolves. Serve over ice or let tea come to room temperature then serve over ice.