In just over two weeks you'll no longer be able to spend the old £1 coins in shops and there are some sneaky spots you might want to check to make sure you get rid of them before the deadline.
From 15 October, shops can refuse the old version of the coin.
However, most banks and Post Office counters will continue to accept them from customers.
We all like to have a back-up cash fund for a rainy day so it's worth checking your over-sized whisky bottles and kids' piggy banks.
£1 coins are handy to keep in the car to use as trolley tokens and for pay-and-display car parks and on-street parking.
Remember those thick, hooded jackets you only pull out from under the stairs when the cold weather sets in? It's worth checking your pockets for old coins.
For those of us who hoard bags and purses, particularly those you only use for a night out, some of the old coins could be lurking in the inside.
If you're in charge of gathering contributions to your work's brew fund you might want to check if there are any £1 coins waiting to be spent.
If you collect donations for charities don't forget to empty out your boxes to make sure any old coins are exchanged.
Gym lockers often use £1 coins as a deposit
If you send your children to school with money for lunches make sure you check they're not collecting any old coins.
Rushing back to your desk after nipping out for a quick sarnie means we sometimes throw any change into our top drawers when we get back to the office. Make sure you check yours.
It's a cliche but the back of your sofa is likely to hold some spare change - and maybe even some pound coins if you're lucky.
The new £1 coins have been produced by The Royal Mint in Llantrisant, South Wales, where 1.5 billion new coins are made at a rate of up to 2,000 each minute. That's a staggering three million every day.
Around one in every 30 old, round pounds is a dud.
The new coin has a string of anti-counterfeiting details, including material inside the coin itself which can be detected when electronically scanned by coin-counting or payment machines.
Other security measures include an image that works like a hologram, and micro-sized lettering inside both rims.
Some of the round £1 coins will be melted down and reused to make the new £1 coin, but not until the deadline of October 15. The old coins will stop being legal tender on October 15, but they can still be used until then.
Thickness: 2.8mm - thinner than old coin
Weight: 8.75g - lighter than old coin
Diameter: 23.43mm - larger than old coin
Number to enter circulation: 1.5 billion - about 23 per person. Old £1 coins will be melted down to make new ones
Outer ring: gold-coloured, made from nickel-brass
Inner ring: silver-coloured, made from nickel-plated alloy
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