It stretches up to 200%, adheres to itself and uneven surfaces, and is ideal for preventing evaporation, contamination, or spills in bottles, cans, etc I use it to seal perfume bottles for shipment. I find it stretches over 200% just with the warmth of you hands. Great for travel to prevent leaks and spills.

You'll get 20 - 2 inch pieces, like 2 rows of the above picture. First class. It ships with paper between to prevent self adherence. Very useful! Look it up!