“Not bad either” versus “not bad neither”

Question

There are more Google matches for the first sentence, but the last one sounds better to me. Which one is correct?

Answer 1

Don't use no double negatives, as a general case. While the use of "not bad, either" is a bit on the informal side, in order to maintain proper logical sense, if you wish to use "neither", you must not use "not."

Hence:

The food was good. The drink was also good.

Becomes:

The food was good; the drink was not bad, either.

Or:

Neither the food nor the drink was bad.