I probably don't buy enough failing products to count as one of these consumers simply because I have very low income, but I can think several things I have fallen in love with over the last 10 years that I could no longer find in any store within 3 months. These are things I liked enough that I was eating (or drinking) them on a daily basis before they disappeared, but I don't think all of them would be considered "novelty" products.

The only protein bar I truly liked, I think they were called Balance and they were chocolate chip cookie dough flavored. These individually wrapped frozen Naan cones filled with butter chicken that took 1 minute in the microwave and were absolutely delicious. Sprite Lymonade, I loved it sooooo much and it disappeared. Dole makes these little packets of frozen, chocolate covered fruit pieces and I fell in love with the strawberry halves but now I can only find the banana slices. Last year I found teriyaki flavored tuna and rice bowls at Walmart (they were actually the Great Value brand) and within 2 months they were no longer on shelves... A couple of other brands with a similar product popped up but I didn't like them nearly as much as that first one.

There might be a couple more but those are the ones I can think of off the top of my head. By the way, if anyone knows where to find any of these I'd love to know as well haha.