The present invention addresses the problem of providing a frozen foaming body for a non-beer alcoholic beverage or a soft drink, providing a non-beer alcoholic beverage or soft drink in which the frozen foaming body is floating, and providing a production method for the non-beer alcoholic beverage or the soft drink in which the frozen foaming body is floating, the non-beer alcoholic beverage or the soft drink having a mouthfeel that integrates subtle, creamy bubbles and fine ice, having a refreshing mouthfeel, and having a high coefficient of cubic expansion (overrun). As a solution, the present invention produces a frozen foaming body having a coefficient of cubic expansion of 200% to 370% in a non-beer alcoholic beverage or a soft drink by adding a beverage foaming agent and a freezing point lowering component to the non-beer alcoholic beverage or the soft drink, and then using a freezing device to process a frozen beverage base liquid obtained by adjusting the freezing point of the non-beer alcoholic beverage or the soft drink to between -0.8 and -5.8°C. The present invention provides a highly-palatable frozen foaming body for a non-beer alcoholic beverage or a soft drink having a mouthfeel that integrates subtle, creamy bubbles and fine ice, having a refreshing mouthfeel, and having a high coefficient of cubic expansion. The present invention also provides a non-beer alcoholic beverage or soft drink in which the frozen foaming body is floating.La présente invention vise à concevoir un corps sous forme de mousse congelé pour une boisson alcoolisée autre que de la bière ou une boisson non alcoolisée, à concevoir une boisson alcoolisée autre que de la bière ou une boisson non alcoolisée dans laquelle flotte le corps sous forme de mousse congelé et à concevoir un procédé de production pour la boisson alcoolisée autre que de la bière ou la boisson non alcoolisée dans laquelle flotte le corps sous forme de mousse congelé, la boisson alcoolisée autre que de la bière o
