For a while now, I have been making my own cold bowls for my cats. This is used to serve milk, keeping it fresh for longer, as well as to serve free-choice canned food when I am too busy to serve them individually. Cats take time to eat and canned food should ideally be thrown away when it has been out for three hours maximum.
Here is a way to make your own.

When you remove the bowl(s) from the freezer to use for serving, place the bowl on top of a cloth or towel to soak up the melted ice. Voila! A handy cool pet bowl, which you can make at home.