A tablespoon is a non-scientific but very widely used unit of volume, which works very well in cooking, herbal medicine, etc. It is represented by a capacity of one tablespoon which varies from roughly 15 mL in the US to 20 mL in Australia.
1 If tea is properly stored, it can potentially last up to a year for green and black teas. White tea lasts about six months before it isn't as good in quality as when fresher. Stale tea (or bad tea) will taste flat, as if you're drinking paper.  Glass or ceramic containers are fine provided that they're opaque.
Pure Leaf Iced Tea is a brand of bottled iced teas owned and distributed by Pepsi Co. Pure Leaf comes in a range of flavors and varieties with varied caffeine content. The amount listed above is for their Sweet Tea variety. Pure Leaf Tea is Pepsi's attempt at a natural bottled tea beverage with just a few simple ingredients unlike their Lipton Brisk line. Here is the caffeine content of all of the Pure Leaf Teas: Despite the healthy sounding name, Pure Leaf has many varieties with a great deal of sugar. 42 grams in Sweet Tea and a whopping 65 grams in Pure Leaf Extra Sweet Tea, which is like eating 2 1/2 Snickers candy bars. Where To Buy Pure Leaf Iced Tea