Mix cucumbers, onions, peppers and salt; set a side.
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 until melted.
Place all veggies in large mouth canning jars (2 quarts or 1 half gallon jar)
Pour mixture over cucumbers, store in refrigerator.
Will keep up to 2 months
Makes 2 quart jars