Warning issued to people planning on drinking Baby Guinness during St. Patrick's Day

If you're planning on enjoying a Baby Guinness this weekend (of course you are) then listen up.

The St Patrick's Day tipple, which looks just like a mini pint of Guinness, is a firm favourite over the Irish holiday.

But if you are planning on supping on a Baby Guinness then there's an important warning you need to take note of.

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The teeny drinks are made up of Baileys and coffee liqueur.

And if you're partial to a bit of Baileys, then you might even have some left over from Christmas. But if you are thinking of digging out a bottle of opened Baileys, then beware.

There's a common problem people keep encountering with the bottles.

Usually after the festive period, Baileys often is banished to the back of the fridge, which can be a bit of a problem because Baileys does have an expiration date.

While the drink company itself says it has a shelf life of two years from the date of bottling - opened or unopened - there are others who warn that you'd better drinking the lot within six months.

As a general rule of thumb, if the bottle is unopened then it might be alright for two years, but once opened you should probably finish it off within six months.

So it's worth being cautious about when you opened the tipple and how long it's been since then.

And if you are planning on chucking any out, there's something else you should be aware of, too.

Normally, you might think about pouring the expired beverage down the kitchen sink and sticking the bottle in the recycling, but according to the Daily Mirror, that's not what you should do.

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They report that tradesmen from MyBuilder.com have warned that Baileys can 'wreak havoc' with your plumbing and even end up blocking your pipes.

This is due to the ingredients in the drink, which are a huge no-no for drains.

Since dairy cream contains a lot of fat, it puts Baileys in the list of things that should never go down your sink - with the big three being fat, oil and grease.

Instead, you're best pouring the liquid contents into a container and then chucking that in your bin.

Whatever you do, don't pour it into the bin directly either or it'll probably end up all over the kitchen floor when you come to empty the bins.