If I "open" it to get the separate items, is it possible to revert it back to the original item afterwards? :]

Nope, once it's opened, you cannot close it :)

Once you open a MCT you can't change it back into the trunk itself.

Curse you, quotation marks. ;-;

Aw man, okay then. Guess I have to choose between the male and femme items then. Thanks, yeah? ^-^