A:Answer Thank you for your question Baris.
As you know, LIZ uses UV light to sterilize 99.9% of viruses and odor-causing bacteria, just by tapping the lid.
When the UV process is ongoing, the lid of the bottle will flash white.
If the sterilization process is stopped or doesn't start (for example, if the lid is opened during the process, or the bottle has been overfilled) the lid will flash red to indicate the UV sterilization isn't active.