You want a blend of green tea, mint tea (peppermint or spearmint), and a fruity tea like peach.
Instead of teas with "natural flavors" and other weird ingredients, use clean organic teas.
To skip the unnecessary sugar in lemonade, use pure lemon juice and honey to sweeten.
Honey Citrus Mint Tea may help to soothe sore throat and coughing. It's best enjoyed warm.