Mine has started standing in the bath tub on a non-slip mat for a shower so that's rather helpful of him. Still use the Angelcare one when washing his hair.
We have a shnuggle toddler bath which is suitable for 9 months plus. It fits inside our bath and fills up quick
One of us goes in with her as she can sit but we like the security of having our legs around her if she suddenly falls
Just in normal bath either sat up with non slip mat or laying down