What level should hot water be filled to when preparing a Tall Teavana Custom Iced Tea?

When preparing a Tall Teavana Custom Iced Tea, hot water should be filled to the Siren's eye on the logo. This marking is specifically designed to indicate the optimal level of hot water for brewing iced tea. By ensuring the water reaches this line, it allows for the right infusion time and extraction of the tea flavors, resulting in a well-balanced and aromatic beverage. This level also accounts for the ice that will be added later, ensuring that the final drink has the intended strength and taste without being overly diluted.