Not too big and not too small, this 1-liter bottle from HydraPak is just right. With the capacity to hydrate a single person for an afternoon at the beach, a travel day or a short hike ...

They estimate a 40-year shelf-life for 750-milliliter (25-ounce) bottles, and 82 and 132 years for 1.5-liter (50-ounce) and 3-liter (101-ounce) bottles, respectively. The researchers measured the ...