REVIEW: WAATR HydroCap – UV Self Cleaning Water Bottle Cap!

I love my wide mouth Hydroflask ( ) and ThermoFlask take them everywhere with me. I just got this WAATR HydroCap ( )- Self Cleaning UV-C light emitting water bottle cap so I can kill the germs in the water bottle in case the local water fill up station may need the water purified with UV light.

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According to the packaging, WAATR HydroCap ( ) uses UV-C light to kill 99% of the germs with the UV-C light in the rechargeable cap. For me it brings me peace of mind to zap my drinking water. Especially when traveling to places like the woods or other countries where water safety is a concern.

WAATR HydroCap ( )- Self Cleaning UV-C light emitting water bottle cap
is pretty useful for travel and zapping water with UV C light.
What I liked and disliked about the self cleaning bottle cap:

  • Great idea for travelers
  • Great for people who love their HydroFlasks and dont want to buy another water purifier specific bottle.
  • Simple to use.
  • Reminder to drink water timer
  • Self cleaning mode
  • Different levels of water purification.


  • No USB C fast charging – 3 hours to charge initially.
  • Charging cable is proprietary.
  • Need to fill the water bottle completely to activate UV light.

Overall I love my Waatr HydroCap, more for the ability to use UV light to purify my water when I travel to the gym, back woods hike, or to another country. It doesnt add too much more weight and the USB rechargeable battery is convenient.

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