Sketch that helped two sleep-deprived fathers a multi-million dollar business ...

It was  on a flight to a friend's that two sleep-deprived new fathers turned a conversation about the difficulties of parenthood into a lucrative lightbulb moment. 

Perth friends Ricky Hee and Alexander Djojoutomo began talking about a way to hasten the bottle-cleaning chore when an idea came to them.

Recognising there was a gap in the market, the two men decided to launch a business, and the Bottle Bath was born. 

Friends and father Rickey Hee and Alexander Djojoutomo (pictured with their daughters Alana and Chantelle) were on a flight to a friend's wedding when they agreed they needed to sold the problem of waching baby bottles

Friends and father Rickey Hee and Alexander Djojoutomo (pictured with their daughters Alana and Chantelle) were on a flight to a friend's when they agreed they needed to sold the problem of waching baby bottles

The product is a three-in-one cleaner which washes, sterilises and then dries baby bottles after use. 

Its design includes a clear cleaning dome, a clean water tank, a menu button and a base unit. 

'We were new dads, and hands on dads, and we noticed we spent a lot of time cleaning bottles,' Mr Hee told Daily Mail Australia.

'You get stuck in the kitchen for longer than expected so we started to talk about whether there was a product out there to make it easier.' 

They knew they were onto a solid idea when they found bottle cleaners hadn't changed much over time.   

'New parents have a lot to learn and we figured this product would help ease some of the stress of being a first-time parent,' Mr Hee said. 

While sleep deprived and on the plane they both agreed bottle cleaning took up more time than necessary and decided they would 'try and fix the problem' before starting to design  (pictured)

While sleep deprived and on the plane they both agreed bottle cleaning took up more time than necessary and decided they would 'try and fix the problem' before starting to design  (pictured)

After drafting some design ideas they knew they needed expert help and financial backers to bring the Bottle Bath to market. 

However Mr Djojoutomo said they weren't going to take just a rough design and some notes to investors and expect an investment 

'It wouldn't have been fair,' he said.  

Instead each man invested $100,000 each into the

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