The fancy ones that come in glass bottles don't tend to include aspartame (or be labelled low sugar, for that matter, they just taste less sickly-sweet -- wait, no, the reason I know about their low sugar content is that I successfully grew mould in the end of a bottle of this http://www.ocado.com/webshop/product/Bottlegreen-Blossom-Cottage-Morello-Cherry-Cordial/42086011?from=search&tags¶m=cordial&parentContainer=SEARCHcordial_SHELFVIEW last summer (which I'd also recommend, by the way)