The patented, award-winning original Pet Top Portable Drinking Device for Pets allows you to quench your pet"s thirst anywhere. The original Pet Top Portable Drinking Device for Pets fits Smartwater, Fiji and many of the water bottles carried by Whole Foods. (For use with more bottles, including both the newest and prior version "eco" caps, get our Upgraded Short-Neck Adapter, sold separately or as part of the Pet Top Combo-Pack.) Flow is adjustable for any size pet. BPA-Free, Dishwasher-Safe and Made in the USA. To use, simply put on water bottle, open to the right size for your pet, flip it all upside down (no squeezing please) and just let your pet lick the ball at his or her own pace.