Did you know that by rubbing your hands after cooking with garlic and/or onions, you can remove the odors? You can invest in a cute little stainless steel 'bar of soap' like the one below:
OR...you can rub your hands on the inside of a stainless sink, or even a stainless steel spoon for the same effect! Just wet your hands first under clean water, and then let the stainless steel get rid of the lingering odors. Works like a charm!