I've tried many vacuum-insulated containers and I always go back to my Hydro Flask. —Les Shu, Insider Reviews deputy editor I'm usually strictly a water drinker at work, but I've been drinking a ...

then Hydro Flask's Flex Straw Cap water bottle is a perfect choice. With 24 ounces of carrying room, this water bottle totes big drinks. Vacuum sealed, it will keep drinks cold or hot — however ...