Imagine the process of making tea was a software task not a physical task! What would it look like?
Lots of processes are converted from real world paper tasks into software tasks, for example: CAD, banking, education, travel arrangements. The process of conversion often involves making icons of the artifacts of the previous physical incarnation of the process. As I write this document in Word 97 I see a scissors and a glue brush for cut and paste functions: an echo of a paste up process long forgotten in document production.
The Tea software should allow tea to be made and served for one or for many. It should allow for a mug of tea in a builders cabin to high tea on Sunday. The user should be able to go back and change their mind. The software should be capable of selecting from a range of cups or mugs and enable choice of types of tea for all or a single tea drinker.