I'm not a big fan of sponges in the kitchen ... to hard to keep clean and all ... but I do find appreciation for them in the bathroom. But how to keep the sink sponge separate from the toilet sponge? Different colors? I always get confused which is which.
However, years ago I started snipping off the corner of the toilet sponge. Regardless of color, I always know which sponge goes with the gross job! What a relief. This is no time for a mix-up!