Separate garlic bulbs into cloves. Peel each clean using paring knife tip, keep whole.
Wash 3 pint jars lids soap hot water. Boil jars pot 10 minutes sterilized. Keep hot.
Combine vinegar, water, salt, peppercorns, bay leaves, red pepper flakes in medium pot using measuring cups spoons. Bring boil over high heat. Simmer 5 minutes flavors meld.
Pack peeled cloves tight into hot jars using canning tongs. Pour boiling brine over covering ½-inch headspace. Wipe rims clean. Seal lids finger tight.
Cool jars counter 24 hours sealed pop. Store pantry dark cool 1 week ready. Fridge after opening.