Rusty hit it spot on. I do the same thing for my tads. Go to the grocery store deli, and get some 16oz deli cups from them. They should sell them to you for like $0.10 each or something, so youll spend less than a dollar on all you need. They will be the cups that you get food in when you order it from their food line (like the potato salad, coleslaw, macaroni salad, all the "homemade" food they sell during the day). And good luck, there isn't any kind of rule here for tad cup size. Everyones methods are different so use what you can find that seems like an appropriate equivalent.
I have used red plastic solo cups before in a pinch, and I kind of liked them in the beginning stages of the tads life because they are much smaller. Like Rusty said in the beginning they dont swim well, sometimes I swear they are dead lol, so the smaller size of the solo make me feel like they find food easier. From experience though, be careful because solo cups are tapered and top heavy, they tip over real easy. If you use them (I would recommend trying them deli cup route first) find a place to wedge them in between 2 stationary objects so they dont tip. I sometimes put them along the wall on my racks, behind my vivariums. That way the vivarium keeps it flush to the wall and I dont have to worry about spillage.
Good luck and let us know what you come up with.
Will
I have used red plastic solo cups before in a pinch, and I kind of liked them in the beginning stages of the tads life because they are much smaller. Like Rusty said in the beginning they dont swim well, sometimes I swear they are dead lol, so the smaller size of the solo make me feel like they find food easier. From experience though, be careful because solo cups are tapered and top heavy, they tip over real easy. If you use them (I would recommend trying them deli cup route first) find a place to wedge them in between 2 stationary objects so they dont tip. I sometimes put them along the wall on my racks, behind my vivariums. That way the vivarium keeps it flush to the wall and I dont have to worry about spillage.
Good luck and let us know what you come up with.
Will