Can you be more specific about your needs? For instance, are you interested in a dry or liquid base? What types of drinks will you make with it? Are you looking to accommodate any special dietary needs (e.g. low sugar, vegan ingredients)?
Most importantly, do you have a cost per serving in mind?
You know, we've played with half and half (that's what's on the condiment bar) and the result has been a little thin. Sweetened condensed milk was to thick to be useful. Heavy cream is right in the middle... brilliant! I'll play with it later. Thanks.