The silicone material meets food-grade standards.It is 100% suckable have no worries about your lipstick being rubbed off while using the straw.This straw uses durable, flexible, non-toxic material. It can replace plastic straws which are not biodegradable and create huge costs to clean up.A compact case comes with the package. You can fold the straw into 4 pieces and then put it inside the case. Additionally, the case makes it easily transportable.