evidence: Many of you will have heard that some teabags contain plastic. Consumer awareness is growing fast, following the 2017 BBC2 documentary ‘Inside the Factory’ and the situation has improved since then. Most ‘pillow’ and ‘pyramid’ style teabags rely on polypropylene fibres embedded in the outer layer to heat-seal the edges shut. Millions of teabags are home composted or put into food waste schemes. They end up in the soil, where the microscopic plastic fibres accumulate and pose a risk to wildlife. [...] Key points - Many tea bags contain plastic.