When looking for high interest and risk-free savings options, you typically want to prioritize safety of your principal while aiming for the highest possible return. Here are some options to consider:

1. High-Yield Savings Accounts: These are offered by banks and online financial institutions. They typically offer higher interest rates than traditional savings accounts. Look for accounts with no monthly fees and competitive interest rates.
2. Certificates of Deposit (CDs): CDs are time deposits where you agree to keep your money deposited for a fixed period (ranging from months to years). In return, you receive a higher interest rate than a regular savings account. The downside is that you cannot withdraw your money before the term ends without facing penalties.
3. Money Market Accounts: These accounts often offer higher interest rates compared to regular savings accounts and provide check-writing privileges. They are typically very safe but may require a higher minimum balance.
4. Treasury Securities: U.S. Treasury securities such as Treasury bills (T-bills), Treasury notes (T-notes), and Treasury bonds (T-bonds) are considered virtually risk-free because they are backed by the U.S. government. Treasury securities can be purchased directly from the U.S. Treasury or through a broker.
5. Municipal Bonds: Municipal bonds issued by state and local governments are generally considered safe investments. They offer tax advantages and typically have lower risk compared to corporate bonds.
6. High-Quality Corporate Bonds: Bonds issued by stable and financially sound corporations can provide higher yields than government bonds. Look for bonds with high credit ratings (AAA or AA) to minimize risk.
7. Online Banks and Credit Unions: Online banks often offer higher interest rates on savings accounts and CDs due to lower overhead costs compared to traditional brick-and-mortar banks. Credit unions also offer competitive rates and are member-owned, which can sometimes translate to better terms for savers.

When choosing among these options, consider your liquidity needs (how quickly you might need access to your funds), the amount you want to invest, and your risk tolerance. For the highest interest rates with minimal risk, a combination of high-yield savings accounts and CDs from reputable institutions may be a good strategy. Always ensure that any financial institution you choose is FDIC (or NCUA for credit unions) insured to protect your deposits.