If you\u2019re planning to go camping, hiking or really do any kind of outdoor exploration this year, you know the value of having good drinking water on hand. Luckily, portable water filtration systems are getting better and better \u2014 and smaller and smaller, perhaps none as popular as the LifeStraw. Literally a straw that you can stick in rivers and lakes, this personal filter removes bacteria and microplastics from the water before it meets your lips. And right now, it\u2019s majorly marked down on Amazon to just $9.74.\u00a0 While Amazon notes the discount is a whopping 81% off its original price of $50, the single straw only retails for about $20 on the LifeStraw website. While we are not sure if this is an error on Amazon\u2019s part, the current price is still lower than LifeStraw\u2019s Prime Day price this past summer. (It should be noted that this personal water filter is often one of our readers\u2019 favorite products.) But there's an additional bonus: Right now, you can play Amazon\u2019s new \u201cSpin & Win\u201d game once per day to receive up to $20 off your shopping cart. That would cover the cost of two LifeStraw water filters; talk about a Black Friday deal! Check out our\u00a0Black Friday coverage to score early discounted gifts for everyone on your shopping list.