The packaging comes from confectionery manufacturer Calico Cottage's new brand, The Cambridge Confectionery Company. Calico supplies the British Museum Shops with sweets.
Calico's Managing director Nigel Baker was inspired to make this move after watching BBC's Blue Planet and being appalled by how much plastic ends up in the world's oceans.
He said: "The move away from single use plastic is an issue that we started to address internally at Calico Cottage in 2017. We are hugely passionate about this and have been working long hours to come up with a solution using a range of technologies, and I am proud that we have brought it to market so quickly."
Angela Pountney, retail buying manager for the British Museum shops, said: "When Calico Cottage presented an opportunity to reduce single use plastics in our shops, and help reduce the impact on our environment, we leapt at the chance. We are pleased to be able to offer our customers the sweets they love without the negative implications of single use plastic bags and be at the forefront of this initiative."
The new bags are certified and manufactured from sustainably sourced trees, which are converted into pulp and then a liquid cellulose solution. This is then made into a transparent solid film, which is coated and cut to size. There are 32 packets in this new range, each retailing at £3.00 each.