I made this video awhile ago and there's all kinds of knockoff's for it, I even see a version being marketed now, but you can make it for pennies. Now that we've moved to freshwater I'm using a plastic spice jar (has plenty of holes) and simply dropping it down with sponge, weights & menhaden oil (and it attracts bass & specs just fine). Refresh the oil every month or so.

Grandpa's Zebco 33 Restore Fix Lube: https://youtu.be/_4BTSEVcbQ4
Zebco 33 Gear Removal: https://youtu.be/ru122KcdLsE
Zebco 33's To Look For: https://youtu.be/Tg917tVFrM8
Bobber Drop Shot Setup: https://youtu.be/eCruAntyeW4
Best Baked Beanie Weenies: https://youtu.be/O52P9IaFdSo
200 more: https://www.youtube.com/channel/UCPSsiJFU2JVh-dfIn1jfZDg/