Teaware Guide
Cold Brew Tea Equipment
Set up for cold brew tea with the right equipment. Learn about cold brew pitchers, bottles, and techniques for making smooth, low-caffeine iced tea.
Why Cold Brew Tea
Cold brewing — steeping tea in cold or room-temperature water for an extended period — produces a fundamentally different beverage than hot-brewed tea that has been cooled. Cold water extracts flavor compounds selectively: it pulls out sweet amino acids (especially {{glossary:l-theanine}}) and delicate aromatics while leaving behind most of the bitter catechins and astringent tannins that dissolve primarily at higher temperatures.
The result is a naturally sweet, smooth, and mellow tea with lower caffeine content (cold water extracts approximately 50-70% less caffeine than hot water) and virtually no bitterness — even from teas that turn harshly tannic when over-steeped hot.
Essential Equipment
Cold Brew Pitcher
The simplest and most versatile option. A glass pitcher with a fine-mesh infuser insert allows you to add loose leaf tea, fill with cold water, and refrigerate for 6-12 hours. The infuser keeps leaves contained for easy removal when the brew is ready.
What to look for: - Borosilicate glass (clearer, more durable, no flavor interaction) - Fine mesh strainer that holds back small leaf particles - Capacity of 1-1.5 liters (enough for a day's drinking) - Airtight lid (prevents the tea from absorbing refrigerator odors) - Easy to clean (wide mouth, removable infuser)
Cold Brew Bottle
Portable bottles with built-in infuser baskets are designed for individual servings. Fill with tea and water, cap, and refrigerate or carry with you. The best designs use tritan plastic or borosilicate glass with silicone-sealed caps.
Ideal size: 500-750ml for personal use. Smaller bottles (300-400ml) work well for concentrates that you dilute later.
Mizudashi (Japanese Cold Brew Pot)
The Japanese have perfected cold brew tea under the name "mizudashi" (literally "water extraction"). Traditional mizudashi pots are glass cylinders with a long, narrow mesh infuser that extends nearly to the bottom, maximizing leaf-water contact. Hario's mizudashi pots are the benchmark in this category.
Wine Bottle Style
Some tea companies sell cold brew vessels shaped like wine bottles, intended for tableside service. These are aesthetically appealing for entertaining but functionally identical to standard cold brew pitchers. Choose based on your use case — daily home brewing or guest presentation.
Cold Brew Techniques
Standard Cold Brew
- Ratio: 10-15 grams of tea per liter of cold water (roughly double the hot-brew amount)
- Temperature: Cold tap water or filtered water
- Duration: 6-12 hours in the refrigerator
- Best for: Sencha, gyokuro, high-mountain oolong, Darjeeling, Ceylon
Flash Chill (Japanese Method)
Brew tea hot at double strength (using half the normal water volume), then pour immediately over ice to chill rapidly. The ice melts and dilutes the concentrate to normal drinking strength. This method preserves the aromatic complexity of hot brewing while delivering a cold, refreshing cup.
- Ratio: 10g tea per 200ml hot water, poured over 200ml ice
- Temperature: Standard hot brewing temperature for the tea type
- Duration: Steep normally, then pour over ice
- Best for: Any tea you want to serve cold while retaining hot-brew aromatics
Koridashi (Ice Brew)
Place tea leaves on top of ice cubes and wait for the ice to melt naturally. This ultra-slow extraction at just above freezing temperature produces an intensely concentrated, deeply sweet liquor — more of a tea experience than a thirst quencher.
- Ratio: 10g tea per 100ml (measured as ice)
- Temperature: 0-4 degrees Celsius (melting ice)
- Duration: 1-3 hours (time for ice to fully melt)
- Best for: Premium gyokuro, sencha, high-grade Chinese greens
Best Teas for Cold Brewing
Excellent cold brew candidates: - Japanese sencha (especially fukamushi/deep-steamed) - Gyokuro (cold water unlocks extraordinary sweetness) - High-mountain Taiwanese oolong (Ali Shan, Li Shan) - Darjeeling first flush (floral notes shine without bitterness) - White tea (Silver Needle, Bai Mu Dan) - Hojicha (nutty sweetness without caffeine concerns)
Less suitable for cold brewing: - CTC black teas (designed for hot extraction) - Smoked teas (lapsang souchong — smoky flavors become harsh when cold) - Heavily roasted oolongs (roast character mutes in cold water) - Pu-erh (requires high temperature to extract properly)
Storage and Serving
Cold-brewed tea keeps well in the refrigerator for 2-3 days, though it is best consumed within 24 hours for optimal freshness. The lack of high-temperature extraction means fewer tannins are released, so cold-brewed tea does not develop the cloudy "cream down" that can affect iced hot-brewed black tea.
Serve over ice if desired, or drink straight from the refrigerator. Cold-brewed tea requires no sweetener — the natural sweetness from amino acid extraction makes it pleasant without additives.