I'll let you define what is "unusual" but let's keep it to ones you own right now! Include a large photo, if you like.
For me: Dali pour Homme Eau de Toilette , Pour Monsieur Eau de Toilette , Skulls & Roses for Him , Golden Oud . Not in the database, Pierre Cardin Fusion (same shape as Pour Monsieur.
Special mention/runners up: Cuoium (wrapped in leather), Kenzo Homme Eau de Toilette Intense (bamboo), 360° Red for Men .
Then there are the very popular ones: revolver cylinders, gold bars, etc. The only ones I have are: Spicebomb Extreme and 1 Million Golden Oud .