A mop is a mostly useless item.
If the player is carrying both a bottle of bleach and a mop, when right-clicking a blood splatter, the option "Clean Blood" will appear. Cleaning bloodstains is currently cosmetic and will
not affect the player's health. Both the bath towel and dish towel also have the same function, however they also have additional uses and will usually be preferred over the mop.
It can usually be found inside kitchen counters.
From newitems.txt (Project Zomboid directory/media/scripts/)
Weight = 0.1,
Type = Normal,
DisplayName = Mop,
Icon = Mop,