ɐnˈʌðɚ nˈoʊɾəbəl dɪzˈaɪn fɹʌm pˈiːɾɚsən ɪz ðə sˌoʊkˈɔːld "pˈiːlˈɪp": ɐ mˈaʊθpiːs ðæt dᵻɹˈɛkts smˈoʊk ˈʌpwɚdz təwˈɔːɹdz ðə ɹˈuːf ʌvðə mˈaʊθ ɪnstˈɛd ʌvðə tˈʌŋ.
Another notable design from Peterson is the so-called "P-lip": a mouthpiece that directs smoke upwards towards the roof of the mouth instead of the tongue.