A canvas bag from Anya Hindmarch featuring the saying "I AM Not a Plastic Bag" sewn into the front. The bag measures about 13" long, 6" wide and 11" tall with a handle drop of 6". The bag is in good original condition but there are indications of use, namely, the hard bottom is a bit warped and there is discoloration around the inside edge.
Few bags show your fashion sense and green credentials, carry a designer label and cost just £5, so it is little wonder that customers are expected to queue round the block tomorrow to get their hands on such an item.
Some 8,000 cloth bags bearing the logo "I'm not a plastic bag" will go on sale at five London stores - and they are expected to sell out within hours.
The accessories designer Anya Hindmarch created the cloth bags for the organisation We Are What We Do to support its campaign against carrier bags.
A book put out by the organisation, Change the World for a Fiver, begins with a call for people to decline plastic bags when shopping. Britons use an average of 167 plastic bags each a year, 10m in total.
The collaboration with Hindmarch has resulted in a bag that promotes a message and, thanks to its appearance on the shoulders of celebrities including Keira Knightley and Lily Allen, has become a fashion must-have.
Some of the limited number already sold have been changing hands on eBay for £175, and even today, a day ahead of new stock hitting the shelves, bids of up to £87 have been made.
Bidding could reach a new frenzy tomorrow as some of those people trying to buy one of the bags in London are disappointed.
We Are What We Do says it has received 11,000 requests for bags through its website but will only be selling 4,000 bags tomorrow.
The four Anya Hindmarch outlets in London selling their share of the bags are expecting queues before they open, at 10am, and have put on extra security for the day.
"We've been inundated with calls for the past month," says Kate Southworth, a spokeswoman for Anya Hindmarch. "We've had people phone and say they're coming down from Manchester to get one so, snow permitting, we are definitely expecting queues."
The store is limiting sales to two bags a customer, while Sainsbury's, which will have 20,000 bags to sell from April 25, will limit sales to one to each customer on each shopping trip.
Ms Southworth says celebrity appeal has undoubtedly helped fuel the bag frenzy, but that they were attracting attention before they were first snapped on A-listers' arms.
"We did put a small allocation of 1,000 bags on our website in the early days. They pre-sold in five days with no press support at all, purely through word of mouth," she says.
"There has been a real interest in the message behind them."
Roger Granada, who works for We Are What We Do, says the organisation had been surprised by the level of interest in the bags, but concerned at the eBay sales.
He says the organisation has put adverts on eBay urging people not to pay over the odds and pointing out that the bags have not yet sold out.
Granada says he hopes people attracted by the bags are taking on board the message behind them.
"We are not the only carrier bag out there; there are plenty of others people could buy. But there is a campaign behind this bag we hope they will remember," he says.
The campaign is to go international, with a navy blue version of the bag to be launched in the US in the summer. Japan will get its own, green version later in the year, and more will eventually be more for sale in the UK.
In the meantime, shoppers desperate to show off their green credentials may have to settle for a less glamorous but just as practical bag-for-life.