It is so easy to make Chive Blossom Vinegar.
Pick chive blossoms - you will need enough to fill a glass jar. Pull off the little paper wings at the bottom of the blossom. Rinse the blossoms, and dry them - a salad spinner works great for this step.
Pack chive blossoms into the jar. Pour enough white vinegar into the jar to cover the blossoms. Screw on jar cover. Allow to steep for 2 - 3 weeks in a dark place. A cupboard is a good place. Resulting vinegar will be a lovely shade of lavendar and will taste like - well, chive blossoms.
Strain the vinegar, toss the blossoms. Add a spring or two of chives with blossoms attached to a bottle, pour in the chive blossom vinegar. There you have it...a lovely lavender colored chive blossom vinegar suitable for gifting.