A registered no-fee Tax-Free Savings Account (TFSA) with a premium interest rate. The income (interest) you earn on a TFSA is tax-free.
You can choose when and how often you want to contribute. You can contribute up to the annual limit (see the chart on this page) plus any unused room from previous years. No minimum balance is required. You have the option to withdraw funds at any time without penalty. (Transaction fees may apply.)