As foreign as is it to some, some people just don't like the 5 qt containers. I don't mind a 5 qt container at all. But I do like single qt containers as well. Easier to add from a single qt container if adding 1/4 qt, or 1/3, or 1/2 of a quart. As big as the openings are on a 5 qt container it is easy to get more than you would want to add. Again, I have a couple of 5 qt containers myself right now. Valvoline 5 qt container, a Mobil Super Synthetic 5 qt container and a Havoline Pro DS 5 qt container. One thing I also like about some of the 5 qt containers is that they tighten down ALL the way and do not break lose. This makes them great for transportation to a recycling center. Mobil Super Synthetic 5 qt containers, Castrol 5 qt containers, Valvoline 5 qt containers and Super S 5 qt containers all tighten down perfectly and stay that way. Pennzoil containers and Havoline containers all tighten down then pop loose again. Not ideal at all for transport.