Coinbase users can now purchase Bitcoin, Ethereum, and Litecoin using their bank account, and gain access to those funds instantly.
Previously, customers had to wait several days to a week before they could use bank initiated funds to purchase cryptocurrencies. As of now, this is only available to US customers. Coinbase has stated they hope to extend instant purchasing service to other countries "over the coming months".
Start buying Bitcoin, Ethereum, and Litecoin today at Coinbase
Source - https://www.coindesk.com/bitcoin-ether-litecoin-coinbase-enables-instant-purchases-for-us-buyers/