Amazon again offers Crystal Light Iced Tea Drink Mix in Natural Lemon for $1.79. Order via Subscribe & Save to cut the price to $1.70 and bag free shipping. That's tied with our expired mention from last month as the lowest total price we've seen. (It's about $10 less than you'd pay for this quantity in local stores; most charge more for just one pack.)
Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.