Throughout the history of magic, we've seen countless methods for secretly inserting borrowed banknotes inside lemons, eggs, or various kinds of fruit nested together like Russian dolls. They've utilized prepared fruit, switched bills and torn corners to 'prove' that the bill remains the same, although your spectator cannot usually sign it.
All this, though, was before Nourdine created CITRUS: The Next Generation, a completely reliable and exceptionally practical gimmick for magicians of all ability levels. The gimmick can be reused ad infinitum and your spectator herself can open the lemon, orange, or kiwi only to discover her bill, which can be signed, inside. There's no need for any duplicates, and you can even place the piece of fruit on your table, in full view of your audience, before you make the bill disappear!
Each version sold separately:
C1 is for larger fruits like oranges or grapefruits.
C2 is for smaller fruits like lemons or limes.
K1 is for kiwi.