Gili, a developer of motorcycle accessories, has a division within its group called Termopolimer, a manufacturer of plastics for various sectors. The line of vertical reservoir tanks received this photo from Studio Corals, showcasing the use of the tanks in the aquarium market. Thank you, Studio Corals!
The vertical tanks are used as reservoirs for liquids and food, with the black Termopolimer vertical reservoir
https://www.termopolimer.com.br/cisternas?lightbox=dataItem-jozwyeeo
being indicated for non-potable reuse water, and the natural white one for potable water and food products.