Aren't you tired of plug-in room fresheners? The scents are always too strong and their looks are made for hiding. On the opposite end of the spectrum is the Chikuno Cube. They're scentless little air purifiers made of compressed bamboo charcoal.
They act like the box of baking soda in your fridge but they look like little minimalist jewels. And at $18 per year (that's how long their air purifying powers work) they're just as affordable as their uglier alternatives.