Juice.

Soft drink means "soft drink". Soft drinks refer to drinks with an alcohol content of less than 0.5%, such as cola, Sprite, and natural juices such as peach juice and apple juice.

Juice means "juice", so it is a soft drink.

Beer means "beer". The alcohol content of beer is generally between 2% and 5%, which is greater than 0.5%, so beer is not a soft drink.