Carnival Tour to Xunantunich - Bathroom on Bus?

I'm trying to decide which tour to book for Belize and was wondering what kind of bus there is for Carnival tour to Xunantunich. Is it a bus with a bathroom? I know it is a long ride and was just wondering. Thanks for any info you can give.

When I was reading reviews for this on Carnival site, many mentioned bathroom on bus.

When we did this several years ago, there was a bathroom on the bus. The bus was like a Greyhound or newer charter bus like you'd get for a group trip in the States. But the bathroom was available, not that you'd want to spend a lot of time in it.:eek:;)