I wouldn't sail this ship if I were you
1. By burying them in a big jar under a major city for the recipient to find and analyse in several thousand years’ time
2. By hiding your message 75% of the way through a licensing agreement
3. By tracing the letters of your message on the intended recipient’s genitals with your tongue during a seemingly anonymous sexual encounter
4. By teaching your message to the parrots of a region that you know the recipient will walk through, but in a language that no other local walkers speak
5. By dropping a drop of water from your window onto the head of the passing recipient each day; the information being encoded in the ratios of different isotopes of carbon and oxygen in the water (the oxygen being in the water molecules themselves, the carbon in carbon dioxide dissolved in the water)
6. By feeding your message to a large, gormless and tasty fish that you then release into a pool that the recipient is about to go fishing in
7. By writing the message on the internet, sandwiched between two or three of your favourite conspiracy theories and/or racist memes
8. By hiding your message in a relatively anonymous post on tumblr
