This is a portable personal water filter straw, a type of outdoor survival gear.
It is designed for personal use in outdoor settings.
The packaging indicates it is made with BPA-free materials and has a flow rate of 550ml/min.
It works by using a microfiltration membrane to remove contaminants like bacteria and parasites from water sources.
Such filters are commonly used for hiking, camping, and emergency preparedness.
The product has an unlimited shelf life, making it suitable for long-term storage in survival kits.