Owala FreeSip® 32 oz. Stainless Steel Water Bottle. Centuries ago they would've called it magic, today we call it science. Whatever you call it, you're going to love how the FreeSip® straw makes it possible to drink in two different ways. Hold it upright to sip through the built-in straw. Or chug through the wide-mouth opening. Sip or swig - the choice is yours. Some things in life should always be leak proof. Roofs. Water bottles. Life rafts. Definitely life rafts. This bottle is designed to keep liquids inside where they belong.