A bak mandi is NOT a bath tub. It is a basin to store water. With a scoop that water is thrown over the body, like a shower.
It's ok since we don't have the exact equivalent
Dad instead of father should be accepted, is it not
Just don't soak yourself inside a bak mandi cuz that thing should last for more than a bath depending in the size
Curtains should also be accepted
Bought should be accepted
Why not "Father buys the curtain for a bathtub."?