That's how I've made them as well. I also put a 6" long piece of steel round stock inside the pvc. Make sure to slide it to the top of the jug when setting them out. If the jug gets a bite but no fish, the round stock will slide to the line side of the jug and make it stand up like a flag so you know to check the bait on that one
https://m.youtube.com/watch?v=im89sa-gfrk
I also wrapped reflective tape around the upper end of the noodle so they are easy to spot at night.