Composting in the kitchen

If I'm going to get serious about composting, I'm going to need a small composting pail for the kitchen. My sister told me about one she uses that has a charcoal filter in the top to keep it odor-free.

I went to a couple of local stores but they didn't have any. So I went online and found several like the ones she's talking about, including this one, which is stainless steel and has the filter. It's a bit pricey, so I think I'll keep looking for a while.

Any tips?