Re: sachet of sugar... do the trick.
some godawful artificial sweetener
What - like xylitol? (Oooh - it's an 'ol', it must be artificial and really, really bad for you[1]!).
First made from boiling down birch bark when the Scandanavians couldn't get sugar during WW2.
[1] Well - it is bad for you if you are a dog. In humans it causes virtually no insulin-response. In canines, it produces a very large insulin response - enough to send the dog into a fatal diabetic coma. Which is why we don't use it any more..