Where go temporary directory for unzipping?

I have a bash script that creates a directory, unpacks a zip there, does some things, zips it back up, sends it, and removes the created directory . Right now I create the temporary directory located where the script is executed (not where the script is located). Should I instead put the temporary directory somewhere in /tmp/? Hail Satan.

i don't get why people use shell scripts when perl is available everywhere