In the early 2000s when Apple began offering a re-writable CD/DVD drive as an option, they included your first blank DVD-R disc along with your Mac purchase. Apple took the opportunity to fully brand the disc with printed packaging and a custom-printed DVD-R.
I have two unused examples of this official Apple blank media, one with a grape (purple) logo “Certified for use with Power Mac G4 DVD-R drives” (part number 603-047-A, unopened in shrink wrap) and another with a blueberry (bright blue) logo “Certified for use with Apple DVD-R drives” (part number 600-8671).