How to Use a Vacuum Flask Tea Infuser for Hot and Cold Brew

Quick answer

Use your vacuum flask tea infuser for hot brew by steeping loose leaf directly inside, or for cold brew by infusing at room temperature then refrigerating. The Full Leaf Vacuum Flask Tea Infuser makes both methods easy on the go.

Step-by-step instructions

1. Step 1: Prepare your tea leaves: Measure 1–2 teaspoons of loose leaf tea (or one tea sachet) and place it into the infuser basket. For hot brew, use your usual amount. For cold brew, double the leaf quantity because steeping is slower at low temperatures. A common mistake: using too few leaves for cold brew results in weak tea. Adjust ratio based on brew time.
2. Step 2: Add water and steep: For hot brew, pour boiling water (195–205°F for most teas) over the leaves, close the flask, and steep 3–5 minutes. For cold brew, fill with cold filtered water, close, and refrigerate for 8–12 hours. The vacuum insulation keeps hot tea hot and cold brew cold without extra ice. Checkpoint: If you steep hot tea too long, it becomes bitter. Set a timer to avoid over-extraction.
3. Step 3: Remove the infuser and enjoy: After steeping, unscrew the lid and lift out the infuser basket. For hot brew, pour the tea directly from the flask or sip through the drinking spout. For cold brew, strain the leaves first, then pour the concentrate over ice or dilute with water. The infuser basket rinses clean easily under running water. A common mistake: leaving the infuser in the flask after steeping continues extraction, making the tea overly strong or bitter. Remove it promptly.

Product facts

• Full Leaf Vacuum Flask Tea Infuser: The Full Leaf Vacuum Flask Tea Infuser is made of stainless steel, making it the toughest teacup you'll ever own. Durable construction means you can toss it in a bag without worrying about breakage, ideal for travel or daily commuting.