A little bit spammy but the Klean Kanteens which have been recommended a few times are on sport pursuit at the moment and cheaper than Amazon
https://www.sportpursuit.com/join/kleankanteen
Can't really put my finger on it but they do look somewhat vulgar.
I'm not a fan of the tumbler (never seen or used one in real life) but I use the insulated flask a lot
@salad started
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A little bit spammy but the Klean Kanteens which have been recommended a few times are on sport pursuit at the moment and cheaper than Amazon
https://www.sportpursuit.com/join/kleankanteen