Readers reply: Why is sugar-free tonic water always described as ‘slimline’?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts This week’s question: When does a reasonable train route become unreasonable? Why is sugar-free tonic…

To respect copyright, we link to the source rather than republishing the full text. Read the complete article on The Guardian.