Never waste another drop again! New tool lets drinkers blow on the top of a Bailey’s bottle to find out how much is left

Baileys fans no longer have to guess how much is left in the big black bottle.

Instead of looking inside or guessing at the weight, drinkers can now simply blow on the top.

The liquor brand has designed an online tool that listens to the phone recording and calculates the remaining volume.

It’s called SoundScales and it also suggests cocktail recipes and portions suitable for the amount of liquid remaining.

First launched in 1974, the signature black bottle design isn’t just a marketing ploy; it is designed to protect the liquid from excessive light.

Baileys claims its Irish cream can last on shelves for two years without losing its flavor, even if opened.

The online tool is basically similar to the operation of pan flutes, with a deeper note indicating that there is more air in the bottle and is therefore relatively empty. A higher pitch suggests the opposite.

The science behind it is quite simple: the more space there is in the bottle, the slower the air molecules will vibrate.

Drinkers simply need to record blowing into the neck and note whether it is a 700ml or a liter bottle.

First developed in 1971, Baileys is the result of blending Irish whiskey from the Gilbeys of Ireland distillery and excess cream from Express Dairies, both owned by the same company.

It was the first Irish cream on the market when it was launched three years later.

Plumbers have previously warned alcoholics not to throw leftover or unwanted Baileys down the drain.

The thick, creamy consistency can wreak havoc by clogging the U-bend and preventing other liquid from passing through.