Note to The Taming of the Shrew, 1.2.70: "As old as Sibyl"

Sibyl: prophetess of Cumae to whom Apollo gave as many years of life as she could hold grains of sand in her hand. That turned out to be about a thousand years, but the Sibyl was not granted eternal youth, so that she eventually withered so much that she could live in a bottle.

Cumaean Sibyl by Michelangelo (1475-1564) Image Source: The Prophets and Sibyls of the Sistine Chapel