The majority of Amazon products have a few — maybe a dozen — reviews. Then there are the cult favorites. These are the products that have hundreds if not thousands of buyer ratings, and most of them are in the four-star-and-above range. They’re pretty much always featured on the best sellers page, as well as the most wished for section.

Why do these strange and random items skyrocket into popularity and stay there? Simple: they actually work, and they improve people’s lives while doing so. Here are 40 of the most popular cult favorites that reviewers can’t seem to get enough of.