Simmer water.Bring 4 cups of water to a simmer and turn off heat. Simmer water on the stovetop or use an electric kettle. Set the water temperature to 190°F when using the electric kettle.
Put tea sachets in pitcher and add hot water.Cut paper tags off the sachets and submerge the entire sachet in water.
Steep for 5 minutes. Discard tea sachets.
Stir sugar into hot tea until completely dissolved.Use any type of sugar you like. The smaller the sugar, the faster it'll dissolve in the hot tea.
Add ice to pitcher and close with leakproof lid. Shake for 15 seconds.You can hold both ends of the pitcher and just turn it upside down 15 times. The ice will start melting right away, cooling the hot tea.
Pour tea into cups with ice.Optional: Garnish with lemon slices or mint leaves.