Inside the No-Spill Spout there are two vents. The top vent allows air to flow into the bottle while liquid smoothly pours out through the bottom vent. The No-Spill Spout comes with three pieces – a small cap to seal the top of the Spout, the Spout body and a coupling ring which attaches the No-Spill Spout to the 1-gallon refill jug of your choice. Made in America, the No-Spill Spout is created from a single piece of industrial-grade plastic. It is durable and made to last for a long time. Available in a rainbow of 10 colors, the No-Spill Spout’s 3-pieces can be color-coordinated to match your favorite cleaning products, or simple to be as unique as you are. Through simple innovation we say goodbye to frustrating spills and messy clean-up!