I'm hearing you Tanza and Quercus, but I am…...wondering, esp. about the "easy clean-up".
When Jazz travels in her crate, she still gets sick but then she slides all over in it and it and is a disgusting mess when we arrive at our destinations.
For me, the seat belt works best where we can catch the vomit {or as I said, hold the trash can still while she does her thing}.
That way I still have a clean dog when I arrive at my destination. Seems that it'd be easier to cover the seat with something easy to clean {cheap vinyl tablecloth???} or try to teach your dog to use a bucket, than to have a vomit covered dog.
She is a bit better now than when she was a pup. Sometimes she doesn't throw up until just after the car stops moving and the engine is turned off.
But she always throws up at some point.
Ew, and when she was very small -- say up to four months -- she's throw up AND have diarrhea when we traveled. She was crated then, and THAT was soooooo nasty! I can live with the vomit, but the other end....ew ew ew. SO glad she outgrew THAT!