Every kitchen should have these. They make life a lot faster. At first we used them for canned cat food, but now we use them for human food just as often. Rather than rummage around for another container to put half a jar of fruit or veg in because the jar was bigger than the recipe, I just close the lid and toss it in the fridge. They're not leakproof, so knocking one over with liquid creates a puddle, but that's a lot less cleanable than knocking over something covered in cling film.