The thick, silicone material and secure, anti-leakage lid on these bottles make traveling easy. The travel bottles can stand up on their own, and hold capacities of 80ml or 60ml. The flexible silicone makes squeezing out the contents easy - no struggling with stubborn hard plastic. Refills are effortless with the wide mouth design and a screw-top lid. Cleaning is made easy with the fully detachable silicone body, bottleneck, and lid. There is even a twistable window on the lid where you can mark what the contents are.