Only dry shampoo that'll keep me presentable for days

For the tiny bottle, this dry shampoo seems very expensive. However, in comparison to aerosol drugstore brands, this has lasted me over 4 months with room to go, while the others only last around a month. This is also the only dry shampoo that will absorb oil in my hair and keep it looking presentable for days. It's a little tricky to get the hang of it as it can leave you looking a little powdery, but after that I hardly need to reapply the following days.