Its seems plastic bottles/cups etc seem to be the firm fav, although that wow toy looks a little different and somewhat inexpensive compared to some bath toys, i'll add that to the list a long with foam numbers.
I feel like a terrible mum saying shes never played with bottles and similar things in the bath before.
Shes got/had a swimming frog, lots of different squirters, fishing net, singing penguin, bubble machine, sprinkler toy, piano thing, doll in own bath, swimming fish, peppa pig boat, tea set for bath, bath stacking cups, lots of different boats, bath crayons and she likes them all but only for a while. I'll definatly give her some cups and bottles tonight and i bet she will have more fun than with her toys, i know i did as a kid.