● You can drink without spilling with one hand (one-touch) while lying down (or sitting) without moving your head. ● The discharge amount is constant. Even if you accidentally let go while drinking, the automatic shut-off device will activate and prevent leakage. ● It won't leak even if you lay it horizontally on your bedside before (or after) drinking. ● The straw can be easily removed from the device for cleaning, and it uses antibacterial material for peace of mind. ※ Compatible PET bottle sizes are 350-500ml. I purchased it and opened the package, but it's unused. I will ship it via Yu-Packet Post of Yu-Yu Mercari.