As promised, I just made my first order. Thanks for sticking with us.  I'll get 4 oz next time once I decide if the expensive one is worth the extra money.

I notice that your shopping cart asks "what bitcoin address will you use to send the coins?"

If your bitcoin volume grows, this is not going to be a reliable way to identify orders since with a lot of wallets, it's hard to tell which coins are being sent. You are probably better off relying on pricing things to the 3rd decimal like you do already and hoping that no two people are invoiced at the same price.

I'm not sure of the best way to do it, because the coding is over my head. But my guess is that your bitcoin volume is low enough that having 2 invoices that are identical to the 3rd decimal place is unlikely to happen.

For everyone else: Go support this company! Buy tea for yourself and for your grandmother! His shipping rates are extremely reasonable, so buy a bunch in small amounts and try them all!