Persil Small and Mighty seems to last a lot longer than any other washing powder I have ever used. It is doubly concentrated so is more eco friendly than other detergents as it needs less packaging and therefore less lorries to transport it to all of the supermarkets. It is slightly more expensive than supermarket versions of double concentration liquid detergents. Being a student I would probably go for the cheapest option but I haven’t tried the cheaper versions yet so I can’t really compare it. Persil smells lovely, fresh and clean. There are a few different types to choose from so there is something for everyone! I used the Bio version but you can also get Non-Bio, Colour Care, Aloe Vera and more.