I'm impressed

Neil.... mine arrived by post, they were wrapped up in several layers of bubble wrap etc, but there was still a small stain even on the outer cardboard box and when I unravelled it all the tub was pretty greasy.

I've just lifted them all out to check for you and mines got less than an inch in the bottom, probably not even half an inch, the wipes themselves are pretty drenched though.

I've used them a couple of times and it took the advised amount of wipes to clean the back that they suggest, so presumably they're saturated enough.

Hope that helps.