Coffee & Drink in Mecca
Zamzam Water- holy water from the Zamzam spring in Masjid al Haram believed to be divinely blessed is preferred among pilgrims to Mecca.
There are many tea shops that serve tea and cookies. There are also many juice vendors right outside the Mosque, who sell apple, mango and strawberry juices for 1 SAR.
As this is Saudi Arabia, the sale and consumption of alcoholic beverages is strictly forbidden; the local Saudis of Mecca (somewhat ironically) do have a reputation for being big drinkers in private, but don't expect to be invited to the private parties where they drink.