So you'll see some things about how it fits in a car cup holder (Lots of others do too) or how one survived a fire (This is just how insulated bottles like that tend to work) and those are all... good enough... but they're not why there's so much hype. The Hype has been carefully engineered. The head of the company is a Marketing guy, and he basically imported Sneaker culture into a new industry. Stanley Cups are released on a limited basis, with partnerships producing only limited supplies. It's induced scarcity and marketing, people are rushing to get one because if they don't rush, there won't be any more, and that makes more people want to rush to get one.
It's just an insulated cup that is intentionally hard to find sometimes. That's all.
This is the third post I've seen about Stanley cups and only now did I realize it had nothing to do with hockey. I was very confused how someone had spent $3000 on Stanley cups
It's just a tiktok fad, the Guardian had a good article recently. Normal conspicuous consumption nonsense. They're good quality, have been around for a long time, but now they come in colors. The cynical take would be that it is just the most recent way to visually confirm that someone has no individual personality without actually having to talk to them.