Antique/Vintage antique fab francaise Silver or silverplated Container mod department made in france

Don't know for sure but my first thought when I saw your item was that is a fancy male urinal.

I saw this sterling silver toilette set on the Antiques Roadshow back in 2013 & I guess if someone once owned a sterling chamber pot then a silver plate male urinal is entirely possible.

https://www.pbs.org/wgbh/roadshow/season/18/knoxville-tn/appraisals/silver-toilette-set--201305T24/

 

Before the buyers buy it.I have offered to clean items and their answer was no.