A photo of a Starbucks coffee cup lid was shared on Reddit, with many people admitting they had never noticed the 'strange' ...

Starbucks fans have been left baffled by a 'strange' symbol on the coffee chain's lids - and it turns out there's a very good reason for it ...

If you're a coffee lover who gets their daily Starbucks fix, you may have noticed a 'strange' symbol on the cup's lid – and ...

Coffee fans who love to get their Starbucks fix on a daily basis might have noticed the 'strange' symbol on the takeaway cup ...