Nice scene. The absence of details make it even more zen. Any way, to distract myself from my work, I looked at your blend to fix the noise. First, I moved the soda can to the left. (Totally irrelevant but it was too perfectly aligned with the background.) ;-) Next, I created a default Cycles material for everything. (Do not know if it is really useful.) And finally, I decreased the power of the light bulb to 50, even 25. That did the trick. It reduces the halo of light on the background but it also greatly reduces the noise. Cycles prefers big soft lights to tiny harsh ones. To finish, I set the world background to full black to get darker shadows. In the end: 6 min. 27 s. for 1280x720 at 1000 samples on my GT 560's GPU (not a power monster), not 6 hours and not much more noise than the usual Cycles grain.

Looks beautiful, just a tip: if noise is causing too much trouble for you, you could set "clamp" (under Sampling option) to anything other than zero (I tried 3) and most of the noise gets eliminated. Thanks for sharing :)

Is this... based of of Doraemon?

Thank you!!