It's not a new idea. The major breweries release those from time to time, usually in the summer as a marketing ploy to appeal to those who want to take beer to the beach or the pool.
Stupid beer marketing history aside, they'll work just fine for your beer.
They come in what they call the "cooler box" which has a plastic liner for dumping ice directly in. I've used them and they're fine for about one reuse before the cap seals start getting iffy. Some of the beers I had for a while on their second use lost carbonation in 5 months. For a new brewer though, you'll likely drink them all in a month or less.