We like the term bundle systems versus travel systems because ultimately that is all a "travel system" is. It's just a set bundle by the manufacturer to make it easy for purchasing. A variety of car seats fit with a variety of strollers so often you can just make your own bundle. There is also a perception that adapters aren't needed if you stick with one manufacturer. Some manufacturers still require an adapter even if you purchase all their brand. If you would like us to bundle a set together by a manufacturer we sell for your registry just reach out, we are always here to work with you to create just what YOU need!