Yuck; that's what you think when you go to take a shower and you find yourself standing in a tub of water up to your ankles. Right after that is about the time the time you wish you had invested in a drain stopper. A plumbing damage, which could cost a pretty penny in the long run.
Sink Stoppers
The most common type of stopper, you usually don't know what's wrong. Most of the time you can simply pull the stopper up, unclog it and replace it.
Another type of stopper often used in the kitchen sink is an Biscuit Kitchen Sink Drain Basket Strainer/Stopper. This model can be used as a strainer to keep foods from going down the drain, or pushed down to use as a stopper to fill the sink up with water for dish washing or defrosting.