Put 10 teabags (strings removed, Twinings Ceylon Orange Pekoe) in 6 cups of cold water. Refrigerate for at least 24 hours. Then add 1/3 cup sugar the juice from 1 lemon OR Put 12 teabags in 6 cups + 10 oz water (58 oz) 3 oz sugar (6 tbs) juice of one lemon i.e. 1 teabag per 5 oz water