Squash, is a non-alcoholic beverage with syrup used in beverage making. It is usually fruit-flavoured, made from fruit juice, water, and sugar or a sugar substitute. Modern squashes may also contain food colouring and additional flavouring. Some traditional squashes contain herbal extracts, most notably elderflower and ginger.

In cooking, syrup is a condiment that is a thick, viscous liquid consisting primarily of a solution of sugar in water, containing a large amount of dissolved sugars but showing little tendency to deposit crystals. In its concentrated form, its consistency is similar to that of molasses. The viscosity arises from the multiple hydrogen bonds between the dissolved sugar, which has many hydroxyl (OH) groups.