Not long ago Nathalie Tufenkji, a professor of Chemical Engineering at McGill University in Montreal, was surprised to discover that the tea she'd been served in a local shop came in a plastic tea bag ...

If you thought your favourite drink couldn't get any better, think again. If you thought your favourite drink couldn't get any better, think again. Seven years after it revolutionised tea with ...

Tea bags come in a variety of shapes, with the most common ones being the rectangular bags, as well as pyramid-shaped ones. However, before the 1940s, they looked quite different from the tea bags of ...