I just bought my dad 3 fairly nice cigars today, and I'd like to keep them in good condition until I go back home for Christmas. Will they stay in good enough condition for the next week or so, or should I think about taking some sort of action to preserve them? I really don't want to go out and buy myself a humidor for this one occasion, so are there some cheap/temporary/homemade humidor options? For example, stick them in a ziplock baggy with a wet sponge type of thing? I guess I should have thought about this before buying them, but too late for that now. Any help is appreciated.

I guess if all else fails, I can just go buy a fairly nice humidor and then take up smoking cigars myself so that I'll actually have reason to use it.

PS: Yes, my dad already has a humidor, otherwise buying one and keeping the cigars in it until I gave him the whole shebang would be a great option. Oh well.