I've always fed my snakes inside their tubs. I don't see any possible benefits from feeding them in a separate enclosure, but I can see problems with taking a hungry snake out of its tub, putting it in a feeding tub and feeding it, then picking up a snake that just ate 10%-20% of it's body weight and moving it back into its tub. It may work for some people, but it is unnecessary and wastes time at the very least.