Tesco and Morrisons are both changing to become greener - and it means shoppers have to take more rubbish back to the supermarkets to be recycled.
Tescois bringing in a new aisle for refillable goods in 10 of its stores from this week - which will stock 88 items in tough reusable packaging.
Brands that will be stocked in the new aisle include Bisto gravy granules, Silver Spoon sugar, Ecover cleaning products, Persil detergent, Coca-Cola, BrewDog beer, Tetley teabags andQuaker oats.
It will also stock 35 cheaper own-brand Tesco items like pasta, rice, oil and sugar.
The idea is that customers buy goods from the aisle, then return the packaging afterwards when they've used up the product.
They pay a deposit of at least 20p per item when buying it, which is then refunded via an app when you bring the items back.
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The packaging is then professionally cleaned so it can be reused again and again, under a scheme run by recycling company Loop.
Tesco Group chief executive Ken Murphy said: "We are determined to tackle plastic waste and one of the ways we can help is by improving reuse options available to customers."
Tesco will roll the scheme out further if it works.
The Tesco stores taking part are:
Tesco thinks if customers in these stores only recycled tomato ketchup, cola and washing-up liquid bottles then that packaging could be reused more than 2.5million times.
Morrisonshas also launched a 'zero waste' pilot scheme in six of its Edinburgh supermarkets to see if it can operate without creating any landfill rubbish at all.
Morrisons customers will be asked to bring back hard-to-recycle items to the six supermarkets.
These include sweet and chocolate wrappers, pet food pouches, hard plastics such as yoghurt tubs, mixed materials like crisp tubes and coffee pods, ink cartridges and batteries, tinfoil and plant pots.
This will all be collected up and sent for recycling, along with extra material gathered by Morrisons staff in-store.
These 'zero waste' stores will also offer more unsold food to customers through theToo Good to Go app.
Morrisons stores will also work with a range of partners to redistribute unsold food within local communities.
The six Morrisons stores taking part in the pilot are Hunters Tryst, Moredun, Ferry Road, South Gyle, Granton and Livingston.
If successful, the ‘zero waste’ store format will be rolled out to all of Morrisons 498 stores across the UK over the next year.
Morrisons also wants to recycle all of the waste it creates across all its stores by 2025.
Morrisons sustainability procurement director Jamie Winter said: "We believe that we can, at a stroke, enable these trial stores to move from recycling around 27% of their general waste to over 84% and with a clear line of sight to 100%."