A snuff tray, also known as a snuff tablet, is a hand-carved tablet or tray that was made for the purpose of inhaling a psychoactive drug (also referred to as being hallucinogenic, entheogenic, or psychedelic, in the form similar to tobacco snuff prepared as a powder using a snuff tube. Snuff trays are best-known from the Tiwanaku culture of the Andes in South America. The principal substance thought to have been inhaled was known as willka, also referred to as cebil, and known as yopó in northern South America and cohoba in the Greater Antilles, where it was also prepared from other species of the genus Anadenanthera.

Tiwanaku is a Pre-Columbian archaeological site in western Bolivia, near Lake Titicaca, about 70 kilometers from La Paz, and it is one of the largest sites in South America. Surface remains currently cover around 4 square kilometers and include decorated ceramics, monumental structures, and megalithic blocks. In AD 800 the site has been conservatively estimated to have been inhabited by 10,000 to 20,000 people.