Where were you in 2010-11, when Earth's citizens were in a flurry over an allegedly looming Armageddon?
All the hoopla inspired Hollywood to produce films about the end of the world that became box office successes.
It also inspired a Thai woman running a bag company to do something before the world came crashing down.
"There were bad weather phenomena happening in several countries, killing lots of people, and it made me think of what I would do if I were in that situation and all power was cut off," says Kanittha Napaworakul, director of Joe House Co. "Seriously, people of my generation can do nothing without power, or a cellphone."
She thought it would be interesting if she could invent equipment to solve the problem of power outages during natural disasters.
"I thought about generating power from nature or renewable energy, and what popped in my mind was solar cell equipment," says Mrs Kanittha, 47.
The suitcase size solar bag can store power for three days.
But solar gear, which needs battery power generated during daylight hours, was not exactly compatible with her bag business.
Come to that, producing leather and fabric bags was not her intended career either.
Before switching to selling bags, Mrs Kanittha worked as an accountant at the country's biggest lender, Bangkok Bank, overseeing offshore loans.
She worked there for more than a decade until the 1997 financial crisis forced Thailand to overhaul its banking system.
The ensuing baht float doubled the debts of the clients she dealt with, rendering all of them bankrupt.
"My job and my life changed immediately from a loan analyst to a bank's witness, standing in court all day trying to make the court order my bankrupt clients to enter the debt rehabilitation process," Mrs Kanittha says. "My job was not interesting any more."
Then her husband, who owned a small business selling bags, lost his accountant. He asked his wife to quit the bank and help oversee his company's finances.
Mrs Kanittha wanted the family business to stop relying on original equipment manufacturers. She eventually created her own bag brand, Big Foot, with the selling points of durability and go-anywhere versatility.
She began thinking of how she could combine her product with an innovation.
"A bag and solar cell equipment are unlikely to go well together, right? So I talked to some experts to make sure that my idea would come true," she says. "I went to the Office of Small and Medium Enterprises Promotion."
Working with Osmep on the product's utility and design, Mrs Kanittha produced a limited range of men's and women's bags with solar cell kits to recharge cellphones and other small gadgets.
Mrs Kanittha is full of power-saving ideas.
The product received a warm response from clients, with monthly sales reaching 100,000 baht.
"I did not have any TV advertising," she says. "What I did was show the product at domestic trade fairs from time to time. So I was satisfied with sales of 100,000 baht monthly."
Most of her clients were teenagers addicted to their mobile phones and in need of a convenient charger.
"Another group were people who cared about the environment and who wanted to save power and save the world," she says. "I understood why sales were limited."
Mrs Kanittha sold two sets of solar bags by that time: a small set that can recharge a cellphone (4,500 baht) and a suitcase size that can store power for three days (12,000 baht).
In mid-2011, when flooding hit Bangkok and inundated industrial parks and residential areas, Joe House's sales jumped dramatically.
"My product met client demand at that time, when electricity in all flooded areas was completely cut off and they needed power for their cellphones to make calls and ask for help," Mrs Kanittha says.
Sales dropped when the floodwaters receded and things got back to normal.
"We still have a certain group of clients, mostly the younger generation who care about the environment and power-saving ideas," she says.
An added pressure was the arrival of the "power bank", which makes the recharging process easier and Joe House's bags less unique.
But Mrs Kanittha vows to carry on with the business and try to adapt her product to customer needs once again.
She's back to working with Osmep to develop new features to catch the eye of buyers.
"The concept will remain about power-saving ideas, as I believe that people still need to rely on power," she says.