Answer: “These fabric sponge balls have a coating to help them slide and grip fabric. They are designed to fit into a tool on the sewing machine table that pushes out corners and shapes when turning the garment right side out. The balls are firm but soft enough not to damage the fabric. However, they can come off easily if pulled too hard.”
it's definitely an egg separator. You crack the egg into the cup, pour the white out and the yolk remains in the cup.
This one not but wouldn't be too sure about that glass plug ????
It's the location of the manholes/wells/valves.
the center of the T-shaped groove represents your location, so for the top sign, there's a valve 0.8 meters left, and 11.2 meters behind you.
It´s a Sanistand type female urinal.