Travelling cage/carrier

Hello once again. I really do apologise for all the threads and questions, but Amethyst and others have been so helpful. It seems like whenever I feel like I'm starting to get my head around chin care, something else will crop up and I have yet more questions. I'm just so in love with Margaret and want to be sure I'm doing right by her.

Anyway, what do you folks use for carriers and travelling cages, like for trips to the vet? Currently all we have are either cardboard or soft-sided fabric...

Travelling cage/carrier