@jingshenbianxi I have something similar but it has 3 long parts that suction cup in place on the tub wall. I love it! I feel my baby is safe to enjoy the bath and sit up!
@jingshenbianxi For me still going strong at 18 months! I plan on using it until I feel confident he can sit in the tub himself and play and not slip around. Whatever age/ stage that is!