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.
how long does dried milk last if the packet is unopened and kept out of sunlight it will last almost indefinitely at least 4 years most likely more if the packet is opened but with an airtight seal e g in a tupperware box it should last for at least a year if the packet is opened and not resealed thoroughly it will last a couple of weeks