Another issue is cleanliness. Refillable bottles and water dispensers that are not washed regularly can accumulate bacteria, mold, and biofilms. While these microorganisms are not known to cause liver can.cer, they may contribute to gastrointestinal illness or infections, particularly in people with weakened immune systems. Doctors advise washing reusable bottles daily with warm soapy water and allowing them to dry completely before refilling.
Health professionals are also concerned about drinking water stored for long periods in hot environments, such as inside parked vehicles or under direct sunlight. Heat can affect the quality of certain plastic containers and encourage bacterial growth if the bottle has already been opened. Using insulated stainless-steel bottles or BPA-free reusable containers designed for repeated use is generally considered a safer long-term option.
It is equally important to understand what truly increases the risk of liver can.cer. Worldwide, chronic hepatitis B and hepatitis C infections remain the leading causes. Excessive alcohol consumption, obesity-related fatty liver disease, diabetes, and exposure to aflatoxins—naturally occurring toxins that can contaminate poorly stored grains and nuts—also contribute significantly. These well-established risk factors deserve far more attention than sensational online claims.
