Super-cheap water purification straw

Russtang writes in with a super-cheap water purification straw… – “Just saw this at my local HarborFreight. Says it removes pathogens as small as 2 microns and treats up to 20 gallons. On sale for $8 – FRONTIER(TM) WATER PURIFICATION STRAW – Ideal for hiking, camping, travel in foreign countries, and emergency use. Removes pathogens as small as 2 microns, including Giardia, Cryptosporidium and E. Coli bacteria, Activated carbon filter removes chemicals and improves taste, Super compact, fits in a pocket, Treats up to 20 gallons of water.” – Link.

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MSR MIOX Water purifier – Link.
SteriPEN portable water purifier – Link.

Jon also reminded me about the life straw – Link.