Here it comes my useless proposal: recycle Nespresso's coffee capsules:

All we need, besides owning one of this subsidized Nespresso's coffee machines, is:
- Old Capsules that we have previously opened and cleaned
- A paper filter that we have cut as it is shown in the previous image
- Grind coffee from a trusted source. In my case I love the 'Supreme' brand, 100% Arabic, from a small shop I know.

E voila, here comes my coffee...

I drink ~8 cups a week, that means it will take me 12 years to buy Canon's EF 100-400mm f/4.5-5.6L IS USM...
Well I guess I need to increase by 12 my coffee consumption so I can save it in a year ;-)