Yup, I was thinking along the lines of a money market savings account. They're perfect for emergency savings funds because there's no restrictions on withdrawals like with a CD. If you go below the threshold then you don't get the higher yield, but that only happens in an emergency when you need to draw from it.

I usually keep enough for my recurring expenses in my checking account, so auto-pay goes through without any overdrafts. I keep a little on top of that for discretionary spending and move the rest to savings.

That's why I said I would never have $15K in checking at one time. Just seems like bad money management.