If your business has funds it can go without for a few months or even years, it might be an interesting idea to invest that money in a time deposit account. A time deposit account is a relatively safe investment (unless the bank where the account is managed goes bankrupt). You are entitled to get back what you put in when the account reaches maturity and the interest rate stays the same the whole time.
However, you need to be aware that your cash surpluses remain tied up for the entire term of the investment. In other words, your assets cannot be accessed until the maturity date.