I can't remember what the stitch the tea cosy is worked in is called. It's some sort of variation on double crochet that gives a nice slant that helps with the embroidering of the hexagons. It's surprisingly difficult to get a proper run down of the molecules in tea, but after some digging I found (and have since lost) a couple of documents that had some structures. I was quite limited in what I could use because due to size constraints, but I managed to fit a representative range. The molecules are:
Gallic acid on the top flap (top photo)
Hesperetin (a flavanone)
Quercetin (also a flavanone)
Theanine (an amino acid)
There are also a number of water molecules in prime hydrogen bonding positions (yes, I'm a nerd).