An iPhone app that enables users to sell bitcoin and other digital currencies has been downloaded nearly 2 million times, according to a report from the San Francisco-based Crypto Coins newsletter.
Users can now place QR codes on their smartphone to show a QR barcode and then scan the barcode onto a water glass bottle.
Users are then presented with a page with a list of options, including the QR code they want to use to sell.
The app also allows users to search for a specific QR code on a QR-coded water bottle, and to place an order with the seller.
The water bottle QR-code feature allows users with the app to sell a bitcoin or other digital currency with just a QR Code.
The feature was originally introduced in March by a company called G2 and is still in beta testing.
The app allows users in China, South Korea, Hong Kong, India, Russia, and Turkey to sell, for example, $2,000 in bitcoin and sell the bitcoins on an exchange.
In India, the app allows sellers to sell $100 worth of bitcoin.
The Crypto Coins publication reported that the company was also selling the QR-Code feature for $25 each, making the price of a bitcoin from 0.0000001 bitcoins to $0.00001 bitcoin.
Users in China can now use the QR codes for bitcoin, and the company plans to expand to the United States and Europe as well.
The company, which is based in San Francisco, says it plans to add more markets to the list in the coming months.
It also said it plans on selling bitcoin-based services to retailers and businesses.