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How Do You Know It Works - Grayl Water Filters

This is in response to a question asked in the comments of our Grayl water filters review. We were asked if we tested the water before and after it was filtered... and if we didn't then how could we know that the filter works and isn't a scam. We asked Grayl for independent lab verification of their filter ability claims. We also found a blog post by Widener's about testing that they sponsored on the Grayl Ultralight and other water filters too. Here's the link to Widener's blog post about Water Filter Tests for Survival: https://www.wideners.com/blog/water-f... Widener's testing showed that the Grayl did filter out what it said it would. This is the link to our video review of the Grayl Water Filters:    • Grayl Geopress and Ultralight Water F...   PRODUCTS IN THIS VIDEO (When you use the links below, at no additional cost to you, we may earn a small commission. Thank you for supporting Wobbly Otter.) Grayl Ultralight water filter, 16 oz: https://amzn.to/2XpRLTg Grayl Geopress water filter, 24 oz: https://amzn.to/3e3B5XH Check out our Amazon Influencer Page to see all the products we use, along with our personal notes about each: https://www.amazon.com/shop/wobblyott... (As an Amazon Associate we earn from qualifying purchases.) CONNECT WITH WOBBLY OTTER OUTDOORS Website: http://wobblyotteroutdoors.com/ Patreon (Your support is deeply appreciated):   / wobblyotteroutdoors   Gear We Use - on our Amazon Influencer page - with our personal notes about each item: https://www.amazon.com/shop/wobblyott... Gear We Use - on WOO Website: https://www.wobblyotteroutdoors.com/g... WOO's Amazon Storefront: https://bit.ly/2Jic9hG Facebook:   / wobblyotteroutdoors   Instagram:   / wobblyotteroutdoors   Twitter:   / wobblyotter   Pinterest:   / wobblyotter   Music from Epidemic Sound: https://www.epidemicsound.com/referra...