Kathmandu has a larger proportion of tea drinkers than coffee drinkers. Tea is widely served but is extremely weak by western standards. It is richer and contains tea leaves boiled with milk, sugar and spices. Alcohol is widely drunk, and there are numerous local variants of alcoholic beverages. Drinking and driving is illegal, and authorities have a zero tolerance policy. Ailaa and thwon (alcohol made from rice) are the alcoholic beverages of Kathmandu, found in all the local bhattis (alcohol serving eateries). Chhyaang, tongba (fermented millet or barley) and rakshi are alcoholic beverages from other parts of Nepal which are found in Kathmandu. However, shops and bars in Kathmandu widely sell western and Nepali beers.