The Bonan-Jeener double bottle described by means of a Bidimensional Hilbert-like Curve -iteration 6- [La double bouteille de Bonan-Jeener décrite à l'aide d'une courbe du type Hilbert bidimensionnelle -itération 6-].
See the Bidimensional Hilbert-like Curve -iteration 6-:
See the Bonan-Jeener double bottle:
See some related pictures (possibly including this one):
See some related pictures (possibly including this one):