I am guessing that these are a clear plastic. The size sounds like they would be large enough to cut them in two around the middle and make two containers, one with the drain hole already made. I would nor recommend the plant in the bottle, although I know it is done with ships. Al

The top hole is big enough, but you will have a hard time getting the soil mix into the jug. People grow tomatoes "upside down" in containers like this with a small hole for the plant (at the bottom) A single drain hole at the bottom will suffice.

I agree with Al on cutting them in half. Alternatively, cut off just the top if you want to maximize container size.

The main reason I would suggest against the "tiny hole at the top" part is convenience. As chadinlg mentioned, you'll have a hard time getting the media into the jug. But you'll have an even HARDER time getting it back out, once it's fully colonized by roots.

Thanks everyone!

Actually, you WANT to allow evaporation from the soil surface. Soil gases (CO2) need to escape, as well. Oxygen is exchanged with CO2 at the soil surface....an essential function of a good soil system.