One way valves stay filled with fluid, even after removing the straw from a user's lips.

These straws have One-Way Valves which stay filled with fluid, even after removing the straw from a user's lips. This feature eliminates the possibility of sucking in too much air while drinking. New straw clip helps manage difficult situations by holding the straw securely to the cup.

This kit comes with 3 one-way straws, 3 clips, and 1 lip block. Colors may vary.

Wash with normal washing solutions or sterilize by boiling.

Cup not included.

Made in USA.