Here is the full list of all 13 Teacup achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Find sugar, white, black and green tea.
Talk with Adele and Evangeline at the Kite Festival.
Find lemon verbena.
Find jasmine.
Find honey.
Find dream tea.
Find rooibos.
Find hibiscus.
Talk with Lyndon and Bertol at the Pond.
Find mint.
Find the tea book.
Find chamomile.
Find lemon balm, ginger and rose hip.