Klean Kanteen's stainless steel Kid Classic Sport 12oz (355ml) bottle is designed with kids in mind. Spill proof sport cap with soft silicone spout and loop so it can be easily attached to a bag. The chip-resistant Klean Coat™ finish is four times more durable and safe for people and planet. Compatible with all Klean Kanteen Classic Caps for easy transition as kids grow up providing a lifetime of use, as long as they don't get lost! Sport cap recommended for kids ages 4+.