Oh, the days when it was socially acceptable to eat pure sugar in ice cold milk for breakfast. For those of us who grew up on breakfast cereal, the nostalgia runs deep for our old favorites, especially those we’ll likely never taste again.

24/7 Tempo compiled a list of breakfast cereals that are no longer available. While it is by no means a complete archive of discontinued flavors, it includes many cereals that were released in conjunction with a popular movie or cartoon and subsequently disappeared when the hype died down. Also revealed are cereals that have since been reformulated to appeal to changing tastes or, surprisingly, to address parental concerns over the color of their children’s stool.

It is not always clear when some of the cereals were discontinued. We contacted customer relations representatives to confirm each cereal was in fact removed from the market. For cereals without an exact end year, we listed the decade.

Major food companies employ virtual armies of chefs, food scientists, and marketing gurus dedicated to rolling out new products. They please us with their vivid flavors and attractive textures — and when they eventually disappear from the shelves, as many of them do, we end up missing them — here are 40 popular discontinued snack foods we really miss.

Click here to learn about breakfast cereals you can’t buy anymore