I bought the 50ml travel size bottle for $12; the full size is $36 for 250ml. But when it comes to hair product, I like them travel size. Cause I don't really use them on normal day. I don't see the need to purchase the full size one. This is a volumising spray for blowing your hair. It can be used on towel dried hair or dry hair for heat protection before using curling wands. That is the reason why I bought this. I wanted a heat protectant product but I also wanted a volumising spray. I wanted one that can be used when my hair is still wet. So this has the perfect description.