Diy Drain Stopper -

Here’s a helpful article you can use or adapt.

If your bathtub has a strainer crossbar inside the drain (two metal bars in an X shape), you can buy a "Twist-and-Turn" Stopper . This screws directly into those crossbars, allowing you to open and close the drain by twisting the knob on top.

A missing or broken drain stopper is annoying, but it is also one of the easiest and cheapest plumbing fixes you can do yourself. You rarely need to call a plumber for this.