These special drinking straws feature a one-way valve that allows liquid to flow only up the straw. Liquid will not flow down this straw after lips are removed. The one-way valve also eliminates sucking air from an empty straw. Each package contains 10 - 7 inch straws. Ideal for persons with weak oral musculature or difficulty swallowing. One-Way Drinking Straw Features Allows liquid to flow only up the straw. Eliminates sucking air from an empty straw. One-Way Drinking Straw Specifications Length: 7 inches Pack: 10 Straws Non returnable if packaging is opened.