Abstract: An overflow strainer includes: a restraining portion (two or more tabs configured to prevent the overflow strainer from falling down the overflow tube, and/or a lip configured for the same purpose); a sealing portion (a lip configured to seal against the top of the overflow tube, and/or a body configured to seal against an internal wall of the overflow tube, and/or a concentric outer seal configured to seal against an external wall of the overflow tube); and a mesh portion configured to block waste solids while allowing fluids to pass. Further, a handle may facilitate the user extracting the overflow strainer from inside of the overflow tube. The mesh portion may be substantially conical or cylindrical or hemispherical.