Newstalk's own, Simon Tierney joined Kieran for a new series 'The Shopping Trolley Hotline'. The series will give listeners pause when they’re filling their trolleys, to consider their options. Are we paying more for things when we could be paying less, but for a similar quality product? We want to explore the provenance and environmental impact of the everyday things we buy.

To kick off the series, Kieran and Simon were discussing tea bags...