Small bottles and other condiments that I keep under the shelf. If I just leave them there, it's hard to get to the things at the back, but they're not big enough to put in a container. Because they are bottles, I can't put them on the top shelf for fear of them falling. I was having trouble deciding how to tidy them up, but then the non-slip tray came into play. I just put everything on the tray. When I want to take something from the back, I pull the tray towards me and it's easy to take things in and out. The bottles don't bang into each other, and if they get dirty, it's easy to clean them just by washing the tray. I also like the fact that I can put it on the kitchen board without it looking out of place, because it's white.