There’s only one that I’ve noticed and it’s the price. But it’s worth it. One jug is about $14 and lasts a week. The cheaper kind, of which I need two, is about $7-8 each. In the long run you could save, but shelling out $14 each time for something you’re just going to throw away feels harder to do than $7 or $8 every few days. All depends on how you look at it.