"Glass hollow oval with clear glass stopper and three glass legs. It has an indentation on the bottom with a hole in the middle of it. What is this?"
"It’s a fly trap. ou add sugary water to the inside, put the stopper in, and then the wasps fly in through the hole in the base, but can’t get out again."
...film container. No mine has this particular imprint on the housing. For pressure you install AP or frog type device under, and pressurize with AT.
They are used all over to prevent damage to ships in general.
We use yokohama fenders while repairing the regular fenders on the jetty.