This Wrap Bowl Cover is made with one layer of cotton fabric, a layer of PUL and a layer of fabric, and two layers of cotton fabric.
The one layer of fabric was perfect for a picnic wrap. If you want to take a bowl of chips or a plate of veggies to a potluck, this is your best choice. Can be beautiful, costs next to nothing and is extremely easy to make (as you don't need to fight with two circles of fabric at any point).
The two layered fabric ones are great for those of us who don't want to use any plastic at all (PUL is a type of plastic… reusable, washable plastic that is used on baby diapers all the time… but plastic).
You might want to check this Reusable Fabric Bowl Cover.