Suitable housing for a 20mm Grammostola Rosea?

[HitokiriSessha]

Err,

The subject title. I have a 20mm G.Rosea sling arriving in about 4 days, and I wanted to know, what is the largest container (dimensions) I could house the lil guy/girl without stressing it to death?
I want as large a container as possible, cos I have a v. small studio flat and if the sling is just in a tiny film pot, I might......misplace it. >,<

Muchly appreciated. ^.^

[Damien]

For spiderlings of that size I use polystyrene cups as they are good for insulation purposes.
They are very handy for putting a good substrate in too.
The plus point is they take up very little room.