Search query: baby bath seats for sitting up in the tub

Product: Fisher-Price 4-in-1 Sling 'n Seat Tub, Multicolor Four stage convertible bath center with squeeze bottle & whale scoop for gentle rinsing or play
Stage 1: Soft mesh sling for newborns
Stage 2: “Baby stopper” insert prevents slipping & sliding
Stage 3: Sit-Me-Up Support aids unsteady sitters
Stage 4: Roomy toddler tub Fisher-Price Multi color