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SteriPEN Classic 3 UV Water Purifier

rated 3.5 of 5 stars
photo: SteriPEN Classic 3 UV Water Purifier water purifier

The Classic 3 UV Water Purifier replaced the SteriPEN Classic UV Water Purifier.


Price Current Retail: $62.99-$89.99
Historic Range: $52.46-$89.99


1 review
5-star:   0
4-star:   0
3-star:   1
2-star:   0
1-star:   0

Works very well, but is restricted to certain water containers due to size.


  • Lightweight
  • Treats biological contaminants


  • Requires strong batteries
  • Only fits certain bottle sizes

I really love this product. However, it only works with certain bottle sizes. I don't enjoy the requirement of bringing heavier bottles that will fit the pre-filter. On the other hand, with good batteries, it lasts quite long.

It takes about 30 seconds to treat 0.5L, or about a minute for 1 L. This is fine for one person, but it eventually takes quite a while for a large group, with infrequent water sources (lots of water filtering). It requires stirring, so it's not easy like drops or a gravity filter.

I've used this product for 6 months, with dozens of days of use. All in all, it is a great product, as long as you're prepared for its drawbacks.

Source: bought it new

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