When you buy your product from Yeti (in this case, it was a Rambler bottle), there are no cards or indication that you should register your product.

But when you go on the Yeti website, there is a tab called Product Registration. Here’s what it looked like as of Feb 28, 2022:

By registering your product, they are offering you a free gift.

I registered my bottle.

Maybe 4 to 6 weeks later I received a basic brown envelop in the mail. Here’s what it looked like:

Inside the envelop, there was this greeting card (shown below).

And there was a sticker kit:

But weirdly, a few weeks later, I received another envelop from Yeti (same look as the previous one). But this time, here’s what was in it:

With this beer opener: