Bought two 12 ounce packets for my kids to use for school lunches. I've had other flip top bottles that have had mold appearing in places I couldn't clean. I wanted something I could clean every part of. I had to buy a bottle brush to fit them and that was fine because now I can be sure they don't have mold as I can clean everything. My kids said their drinks are still cold by lunchtime (around 4pm) but I fill them up the night before and keep them in the fridge. They are hermetically sealed, feel good in the hand and fit perfectly in lunch bags. I'm buying 2 more today so we have extras. Last but not least, the colors are great! Edit: 1 year later After a year of use these bottles are still holding up pretty well. I noticed a few small scratches on the paintwork, which is not surprising since they are thrown into children's backpacks along with metal zippered lunch bags. Also a few minor dents on the bottles my son uses. He said he dropped them a couple of times so again not too surprising. I plan on buying a few more as they have worked great for us.
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