AGP, The most convient and easiest way to store/freeze liquids is to:
1.) Pour a measured amount into a Quart Zip lock Bag (must be Zip Lock), seal with as little trapped air in bag as possible. i use a chamber Vac, but I've had great success just carefully hand-ziping Zip locks for storage.
2.) Seal and arrange the bags flat on a baking sheet. Six to a layer but I wouldn't exceed three layer per baking sheet. Put in Freezer.
3.) When frozen, stack vertically like books on a shelf. Its really handy to use too with all your liquids in the same size bag, in the same area, frozen the same way.
Haven't found anything better.
I do stocks, sauces, graveys, reductions, soups that way. Can preserve in freezer for many months. Its a great way to use as little freezer space as possible.
MRMNS makes a great point about using olive oil to seal out the air. It also works as a free radical scavenger (anti-oxident)