Fanola No Yellow Shampoo (1000ml between $20-$40)
I bought this shampoo about a year ago-- I guess, I was very optimistic and bought a whole litre of it. I love this shampoo, don't get me wrong, but a whole litre is a loooot of shampoo, as I came to understand once I got the bottle. This is my go-to shampoo for anti-yellowness in my blonde hair. I have tried other purple shampoos before-- many of them had a warm undertone, which this one doesn't. This one has cold undertones-- and it really works making blonde hair whiter and cooler. Love it. I use it 1-2 per week.