In Bolivia bags of coca leaves are sold in local markets and by street vendors. The activity of chewing coca is called "mambear", "chacchar" or "acullicar", borrowed from Quechua, "coquear" (northern Argentina), or in Bolivia, "picchar", derived from the Aymara language. The Spanish "masticar" is also frequently used, along with the slang term "bolear," derived from the word "bola" or ball of coca pouched in the cheek while chewing. Typical coca consumption varies between 20 and 60 grams per day, and contemporary methods are believed to be unchanged from ancient times. Coca is kept in a woven pouch ("chuspa" or "huallqui"). A few leaves are chosen to form a quid "(acullico)" held between the mouth and gums. Doing so may cause a tingling and numbing sensation in the mouth, in similar fashion to the formerly ubiquitous dental anaesthetic novocaine (as both cocaine and novocaine belong to the amino ester class of local anesthetics).