Whiskware Stackable Snack Packs with Bluey Designs. Looking for eco-friendly ways to pack healthy homemade snacks? Versatile stackable interlocking containers are perfect for on-the-go snacks or lunches. Each set comes with three dishwasher safe jars: 1/3 cup - 3oz 1 cup - 8oz and 1 cup - oz. The jars can be used alone or easily connected together with the quick-turn Twist n Lock system. The removable carrying handle makes it easy to carry the battery or clip it to a backpack or bag. Perfect for fruits vegetables cookies mixed nuts and toppings. Or fill them with small treasures and toys. BPA and phthalate free; Dishwasher and freezer safe.