This is an entry in our Disneyland 101 Glossary: Disneyland Resort definitions in under 101 words, from Mouse Brief.
Sip and Savor Passes are offered during some Disneyland Resort festivals and events as an alternative way to purchase food and beverages. A Sip and Savor Pass is a bundle of digital vouchers that guests may purchase for use at select dining locations (primarily Festival Marketplaces). Guests exchange these vouchers for tasting-size food and beverages. Depending on how the vouchers are used, they may provide a cost savings for guests over traditional means of food and beverage purchase.