Description
This is a Bombilla (mate straw), specifically a stainless steel version.
It’s used to drink yerba mate (a traditional tea).
The flat perforated end acts as a filter to stop leaves from entering your mouth.
The straight tube is for sipping, and the top mouthpiece is shaped for comfortable drinking.
The marking “INOX” means stainless steel (rust-resistant, durable).
Usually used together with a mate cup (gourd) and hot water.
Often comes with a cleaning brush like the one in your first photo.