For those who already own a wide-mouth water bottle, SteriPEN offers the Classic with Pre-Filter Pack. Like the Safe Water System Pack (but without the bottle), the Classic with Pre-Filter pack is all that is needed when camping, hiking, backpacking or traveling. Use the 40x40 micron screen Pre-Filter to remove particulates from the water. The Pre-Filter is designed to be stored directly on the wide mouth bottle.
- one of the beter inventions since sliced bread Review by me
"classic vs adventurer" -
While the adventurer is a little lighter (103g vs 283 g), I really like the ability to purchase replacement batteries if I run out of spares. If you plan on traveling the world and you're not comfortable with your water sources, choosing the AA version will allow you to quickly treat your water and also replace batteries easily if you run out (the odds of finding coin-cell batteries in the bush are slim to none, AA's are far easier to find). I use rechargeable batteries when I can and they work great. (Posted on 3/8/2013)