I'm going to confess that the OP's example is the very first tank I ever had, and the betta lived for about a year. Sadly, I didn't learn about the cruelty of those "tanks" to save the poor betta.
Not sure if this was already mentioned, but THIS is the most disgusting thing I've ever seen.
Way too small, no place to put a heater, it has to be a nightmare to change the water or do any maintenance whatsoever, and the worst part is that it's an "all in one enclosure". I can't imagine keeping a reptile or hamster in that tiny thing. Really, in some of those shots they had clownfish, goldfish, a leopard gecko? A &*^%ing BOA? What is WRONG with these people?! The only acceptable thing I can think of to use that for is either keeping herbs, insects, MAYBE shrimp or crayfish? I have no experience in keeping those guys but I heard they're fine in tinier enclosures like that, I could be dead wrong though so please call me out if that's the case.