Smelly Proof must be THE producer of ziplock bags. Their baggies are made of really high quality and come in many different sizes and different finishes! If you want to make sure that something smelly stays hidden for the next couple hours, Smelly Proof is a very good brand to put your trust upon. Since it’s still "just" a plastic bag and not a vacuum proof container, it will start smelling after a certain time, but you should be completely safe for at least two-three hours!