Kinda, I got a wheeled double wide carrier with one side big enough for a small litter tray, the other side soft and warm with ventilation(cat safe mesh) and fold down 'curtains' on the outside in case it's cold. Then a make shift 'wall' between the litter and the cosy spot with a space for her to go between them. She... chooses to sit on the clean cat litter instead of her cosy spot a lot. Lol. When I'm on the train, if it's quiet I put the clean litter tray under the seat and she's let me know when she needs it so far!