Weight Watchers wanted its new product—the market’s first all-natural water enhancer—to truly stand out in the $1 billion water flavoring category. Weight Watchers went to Berlin Packaging asking for a fresh design that would accomplish that goal and would also accommodate easy one-handed use by health-conscious, on-the-go consumers.

Berlin created a custom squeeze-and-squirt package boasting a silhouette that seems to burst with the fruit with which the product is made. Designed as a stock-available item by Berlin Packaging’s Studio One Eleven division, the package features a 2.1-oz HDPE monolayer custom bottle with a distinctive bulge at the shoulder, a stock flip-top closure with a no-drip silicone valve and a full-body tamperproof shrink sleeve that is perforated at the neck for easy opening. The swelling at the shoulder and the fresh-cut produce images on the label suggest a ripe piece of fruit, subtly contrasting with competitive products made with artificial ingredients.

The bottle fits comfortably in the palm, easily flips open with a thumb, doesn’t leak even when turned upside down and is small enough to go to the gym or anywhere else the consumer wants to flavor his or her water. Upon introduction, the product skyrocketed to the top spot in its category on Amazon’s Hot New Release list within six weeks of its launch.