Abstract: A temperature changing device has a tubular member with a restricting portion that changes the air speed and pressure of liquids flowing there. An air inlet is provided to allow cooling or warming air to be drawn in and mix with the liquid in a mixing region. The air inlet is placed close to the bottom portion of the restricting portion. The restricting portion and inlet opening are placed far enough from the open top portion to allow for sufficient temperature change. In one embodiment, a stirring portion is provided to allow a user to stir a beverage such as coffee or tea.

Abstract: A temperature changing device has a tubular member with a restricting portion that changes the air speed and pressure of liquids flowing there. An air inlet is provided to allow cooling or warming air to be drawn in and mix with the liquid in a mixing region. The air inlet is placed close to the bottom portion of the restricting portion. The restricting portion and inlet opening are placed far enough from the open top portion to allow for sufficient temperature change. In one embodiment, a stirring portion is provided to allow a user to stir a beverage such as coffee or tea.

Abstract: A temperature changing device includes a first tubular member having a top end and a bottom end. The second tubular member is fixed to the first tubular member. A second tubular member communicates with the first tubular member via an air receiving passage. An intake control device is arranged between the air receiving passage and the bottom end of the first tubular member.