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 has a larger market share than all of Coke's iced teas labels combined. Pure Leaf sales surged 49 percent last year, driving growth of 7.9 percent in the number of cases of tea it sold across all brands, according to Beverage Digest. All of which leaves Coca-Cola with a steep Pepsi challenge.