Tax-free savings options for vacation fund

[mrmatt]

I'm looking to maximize the after-tax amount of savings I put away for a trip next summer. I'll likely contribute to it once per month for 10 months. Are there any options that would be non-taxable, but liquid enough to withdraw ICE or before 12 months is up? This may just be wishful thinking.

[disneysteve]

You could open a tax-free money market account but you really need to run the numbers to see if the return would be better than a taxable account after taxes.