Ziploc bag or even a cup of water, just stuck in the fridge. If you don't do like I did and forget that they were in that fridge downstairs and thus forget to keep (fresh! if it gets slimy you've gotta change it out, just like with cut flowers) then you'll lose the cuts. If you do the baggie thing, I like to do like my mother taught me for *all* plants* (this is how I got cuttings of my grandmother's herbs from Puerto Rico to California) and recut under water, then wrap the ends in paper towels while under water and when you lift the cuttings, simply squeeze the excess moisture from the towels, then place into the baggies. In the fridge I would leave the baggie partially open with a little extra water in it, so the plants can breathe a bit.
I've kept cuttings in my fridge using the cup method (air flow is important for long term health) for a couple of months. They won't grow roots, but if you put the cup somewhere warmer then they often will.
