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.

The Hog Story: https://youtu.be/hNt81cS--Pk
Daytona Rig: Snag Free: https://youtu.be/eCruAntyeW4
Rebuild Grandpa's Zebco: https://youtu.be/_4BTSEVcbQ4
Crappie Liquid Nibbles: https://youtu.be/jeSWmrwhcGA
100% Effective Bank Bass Fishing: https://youtu.be/Obu4ENBHcQc
Baked Beanie Weenies 50 Year Favorite: https://youtu.be/O52P9IaFdSo