Hi there - love the idea!  Have to agree about background - The contrast is cool so maybe - if you want to keep it that way, put them inside a dark kitchen cupboard?  Have a sliver of light fall in through a crack or opeing showing bits of the wooden cupboard?  Great idea though - Good luck!

Nice idea, but with a lack of background it does not seem to have had that much work put into it. A recomendation for a background would be a kitchen counter. Anyways nice shading.