Sir; While reading with interest how some of the large grocery stores can now offer vouchers in exchange for loose change (The Grocer, May 26, p10), can I suggest that a system I saw recently in Boston, US, has much to commend it, especially in building customer relations and good neighbourliness? By the till, albeit of a small retail outlet, there was a small box containing cents with the notice: Need a Penny Take a Penny Have a Penny Leave a Penny. This was not charity fundraising. The coins just "helped out" when someone was short of those few cents, and it also helped the shopkeeper. Perhaps not quite such "big business" as vouchers, but it certainly gave one a warm feeling. Naomi Arnold Naomi C Arnold Consultancy Stoke Poges Buckinghamshire {{LETTERS }}