Mix cucumbers, onions, peppers, carrot, celery and salt; set aside.
Put vinegar, sugar, celery flakes and pepper flakes in a pot and bring to a boil. Remove from heat and add 2 handfuls of ice and stir until melted; set aside.
Place the vegetables in large mouth canning jars (2 quarts or 1 half gallon jar).
Pour vinegar mixture over cucumbers and place tops on jars and screw into place. Let jars cool, then store in refrigerator for up to 2 months.