Because it's so important, make sure it's right every time. Forget the old style, upgrade to the latest design. Made from the toughest materials for longer life and thicker than most competitors. Includes a lid to keep the dust and dirt out and it's flexibility keeps it from cracking. More stable than the older designs when filled with oil. More ratios than the older design (1, 2, 2.5 and 5 gallon). Rations from 8:1 all the way to 70:1. Even shows as percentage of mix. Even has graduations in gallons, fluid ounces, liters and milliliters on it.