On Friday, October 26, 2012 11:53:25 AM UTC-4, . wrote:
Think of Old Spice Aftershave bottles; they have very small mouths.

Some grocery/department stores will have sets of very small funnels in their kitchenware departments. If the liquid is fairly thin, you can siphon with aquarium tubing. If the bottles are not too deep or oddly shaped a basting syringe would be an option.