Fill the water bath canner with water and bring to a boil over high heat.
In a 2 quart saucepan, combine the vinegar, water, canning salt, and sugar. Simmer over medium heat until the salt and sugar is dissolved (approximately 5 minutes).
Wash all of the jars, lids, and bands in hot soapy water.
Place one crushed garlic clove, 1/2 tsp of peppercorns, and 1/2-1 tsp of crushed red pepper into each jar.
Fill each jar with the green cherry tomatoes.
Using the food funnel, fill each jar with brine, leaving 1/2 inch head space. Run the bubble popper through the jars to release any trapped air and adjust brine level if needed.
Wipe the rim of the jars with a clean dry paper towel.
Place the lids onto the jars and secure with the bands, tightening only fingertip tight.
Place the jars into the boiling water bath, cover, and process for 15 minutes.
After processing, remove the lid, turn off the burner, and carefully pull the jars with the jar lifter onto a towel lined cutting board to cool.
Leave the jars to cool for 12 hours before labeling, dating, and storing. If any jars did not seal, refrigerate and use first.