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An ice tube used by setting it in the Stout Air 550/1000 and reuse bottle S500. It is a convenient item that can keep the coldness of the drink for a certain period of time. It melts like ice and does not dilute the drink, so you can keep it delicious. Put water in an ice tube, freeze it in the freezer, and set it in the splash guard (middle pig) built in the bottle. * Ice tubes are Stout Air 550 and 1000. It is shared with the reuse bottle S500. Product name: Ice tube Usage section: Cold insulation material: Polyethylene size: Approx. W30mm x D30mm x H140mm Heat resistance temperature: 110 ℃ Cold resistance temperature: -40 ℃ Country of origin: China