Easy Refrigerator Pickles That Stay Crisp

Ingredients

• 6 Kirby, Persian, or baby cucumbers ((about 1 1/2 pounds; thinly sliced))
• 1 large onion ((halved and thinly sliced))
• 1 tablespoon kosher salt
• 2 tablespoons sugar
• 1 cup ice cubes
• 1 ½ cups rice wine or white vinegar (white wine or distilled)
• 2 teaspoons pickling spice blend
• 1 teaspoon fennel seeds ( (optional))
• 6 sprigs dill ((be generous))