There's no right or wrong answer to this question - it ultimately depends on what works best for your kitchen layout and how you prefer to keep things organized. However, some common placement options for trash cans in open kitchens include next to the sink, in a dedicated cabinet or storage area, or even built into the countertop. Whichever option you choose, just be sure to keep your trash can easily accessible so that it's easy to use and doesn't become a nuisance.