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The SF1 Soft Flask hold up to 500 ml (17 oz) of liquid, is foldable, reusable, and weighs only 45g. Flexible and easy to squeeze. Wide cap allows easy re-fills and space for ice cubes. The silica gel valve allows air to escape, compressing the flask as you drink to eliminate water bouncing inside.The SF1 is the best way to start consuming fewer plastic bottles and hydrating responsibly.
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