Organizing Spice Tins
What about spice bottles?
Resident Kitten Growling at New Kitten
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There is really nothing you can do other than separating them and slowly reintroducing them each day. Although, letting nature take its course (with your supervision, of course) is really the only way this will happen.
Resident Kitten Growling at New Kitten
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A trick I have heard of is getting a clean towel and rubbing it all over the new cat and then rubbing it immediately all over the older cat. That way the smell of the new cat is transferred to the older cat. Smell, to them, is everything.