The LifeStraw Go Series Tumbler 24 oz—also known as The Study Buddy—is a rigorously tested, insulated stainless steel water filter tumbler designed for daily hydration, travel, commuting, and emergency preparedness. Its two-stage filtration system removes 99.999999% of bacteria (including E. coli and Salmonella), 99.999% of parasites, and 99.999% of microplastics, while the activated carbon filter improves taste by reducing chlorine, odors, and organic chemical matter. The tumbler is lead-free, B Corp and Climate Neutral Certified, and fits most car cup holders. The membrane microfilter lasts up to 1,000 gallons (about five years), and the carbon filter up to 26 gallons (about two months).
LifeStraw stands out for its science-backed validation: the tumbler meets or exceeds NSF 42, US EPA, and NSF P231 standards, with independent lab reports available for full transparency (see evidence dossier). Every purchase provides a child in need with a year of safe water through LifeStraw’s Give Back program, embedding measurable social impact into every product. Customers praise the tumbler’s effective filtration, improved taste, and durable design, while noting minor areas for improvement such as lid tightness and suction resistance. LifeStraw’s blend of technical rigor, practical design, and global impact sets it apart in the portable water filtration market.
LifeStraw products have a history of use in some of the harshest conditions around the world, from refugee camps to natural disasters to extreme back-country, our products have to work because lives depend on them. Our testing and transparency is unparalleled and we use the most trusted performance criteria based on protocols established by the World Health Organization, the US EPA, NSF International and the Water Quality Association.
Overall rating: 4.3764706 / 5 from 85 reviews.
The Study Buddy offers a comprehensive solution for campus hydration, featuring a durable 24 oz tumbler, a versatile straw accessory, and a portable Sip straw. Customers appreciate its sleek design, effective filtration, and the positive impact of each purchase providing safe water for a child in need.
Review topics: ["water","color","design","tumbler","feel","looks","size","filter","quality","plastic","durability","bottle","temperature","cup","taste","straw","idea","lifestraw","use","problem","bacteria","handle","capacity","drink","fits","companion","brand","set","suction","container"].
"Just received my Lifestraw tumbler. I have so many Lifestraw products and love them all. BUT I saw where you can drink something other then water if you take the filter out. How do I do that if there is not straw to get to the bottom liquid? Can it us a regular straw? I don't feel like that would be long enough."
"My new LifeStraw Go 24 oz. Tumbler is my new constant companion. It makes drinking fresh, clean water daily easy. It keeps the water comfortably cold and is simple to clean and refill. I love it!"
"I just started using this and I love it. The water quality at work is questionable at best, and this has been a life saver. The first use, took a little more work to pull the water from the straw, but not it’s great!"
"This is exactly what I wanted, difficult to water when sucking through the straw. But I absolutely love it. This is such a great company, and not my first purchase and I will continue purchasing for you guys."
"So far, I am really happy with the tumbler. I have hard water in my house and I don't like the taste of the tap water so your product seemed like a perfect fit for me. I also like the fact that this one you keep down and drink from it as opposed to other ones that you have to lift it up to drink from it. Those ones never worked for me so I was happy when I went on your website and seen this one and decided to try it. Whoever invented this one is brilliant I think. Thank you for having this!!"
"Love it"
"Working out great. No issues. Would recommend to others."
"Works with out a hiccup"
"Treated myself to the tumbler because I love the company and wanted to try something new. Love the colors/look, the stainless steel and the purifier straw features and that’s why it’s not 1 star. However, the cons are just too hard to overlook. My biggest issues with the tumbler is that there’s no airflow so when the lid is on all the way it gets harder to drink out of the tumbler because you just create a vacuum seal effect the more you drink. It’s really difficult to open the tumbler when you need more, which is often because the filter is big and takes away from the volume of water you can fit inside the tumbler, but the lid is silicone and is a push/pull on and off instead of a threaded lid which amplifies the vacuum seal pressure issue. On the bright side I guess it’s hard to spill when it’s that tight lol. Would love to see an upgraded version of these tumblers where it’s actually easy to drink out of them."
"The water bottle broke when dropped, need to replace lid and straw connector. Also, the other bottle is deeper than the filter straw goes, so even though there’s 1/4 of water in the bottle, you still need to refill. A little annoying."
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