YES, they work incredibly well! I’ve used earlier filters over the years and they work great. My true story about why all of us should have a Water Filtration Straw:
Years ago, a group of us went camping in the Stanislaus National Forest in California during the summer. After setting up camp we decided we would hike around the lake.
We were about halfway around the lake, and it was pretty warm. I was getting really hot and thirsty. The sounds and smell and views of fresh water was getting to me. I needed some NOW.
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