Post-it Pop-up Refill Notes are designed for use in Post-it Pop-up Note Dispensers (sold separately). Value Pack includes four FREE pads in bright colors in addition to the Canary ones. Pop-up notes offer the convenience of grabbing just one note, with just one hand. The accordion-style notes pop up one at a time from a specially designed Pop-up dispenser (sold separately), keeping the notes at your fingertips. Repositionable adhesive won't mark paper and other surfaces. Paper comes from well-managed forests where trees are replanted. Each pad contains 100 sheets.