http://www.shreeswaminarayan.org.uk/academy/vegeter.htm
Coca-Cola (manufacturer) - Not suitable for vegetarians; lists the following products as not vegetarian

These products contain traces of fish gelatine, which are used as a stabiliser for beta-carotene colour.

Fanta Orange
Diet Fanta Orange
Lilt Pineapple & Grapefruit
Diet Lilt Pineapple & Grapefruit

http://www.vegsoc.org/info/stumbling.html
Soft Drinks - Some canned Orange drinks use gelatine as a carrier for added Beta Caratine. (This would not appear on the ingredients panel).
(Text PAMHO:5891790) ---------------------------------------