I really wanted to like this but ended up very disappointed with this product. I was gifted the 24 oz IceFlow Bottle with the flip straw lid and I loved it! It kept my water super cold and ice lasted for about a day, but I wanted a larger volume that would fit in a cup holder so I figured the IceFlow tumbler would essentially be the same in quality but just a slightly different design. I was wrong. I do like the design itself: it’s functional, cute, easy to clean, fits in cup holders, and is leakproof. BUT it does not keep the beverage cold. My ice melts after about 30 min to an hour. At first I thought it was maybe just the ice my fridge makes, but even traditional ice cubes don’t last longer than an hour or so. If I put new fresh ice water in my bottle before bed, it will be room temperature when I wake up 6-8 hours later. Not even a little chilled or cold but room temperature. I really wanted to return this because I just stopped using it due to not keeping my water cold, but Stanley doesn’t accept returns after it’s been opened. So now it’s just sitting on a shelf because it’s useless 😢 Reading the other reviews, I don’t know if I got a dud or what, but it’s very disappointing
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