Sturdy but not a great design.
I received this free in a Flex Delivery promotional package from Canada Post, It's nice and sturdy but the mouthpiece is horrible. It is made with one of those screw-in infusers for fruit but this means they have also put in a filter so you don't choke on a blueberry. The mouthpiece is also weirdly placed and an odd shape. The lid screws on but there is a flip top as well, that isn't really secure - it came open in my bag three days into using it. I'm donating it, hopefully someone else doesn't hate it as much as I do.
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