The Buoy bottle holds 30-oz of water, but weighs only 7 ounces empty: So light, you only carry the water. It opens in the center to allow for proper cleaning in a dishwasher, so no more stale water bottle musk. The thumb-loop allows it to be carried easily and comfortably, and can also be attached to a carabiner. The bold, unique silhouette speaks for itself. At the same time, the Buoy bottle has the lowest carbon footprint of any water bottle on the market. It's made of 100% Oceanbound plastic collected in North America and manufactured at a plant in Northern California that generates its own electricity from solar power. Fun Fact - Interchangeable parts allow for a multitude of fun, mix-and-match options when choosing more than one color. Impact Fact - If you credit the carbon that was saved by recovering the plastic before it entered the ocean, the Buoy bottle has a negative carbon footprint.