Ariel washing liquid laundry detergent provides brrrilliant stain removal even in a cold wash. You can also use Ariel liquid detergent to pretreat stains with the green cap, then place your clothes in your washing machine. For best results, insert dosing cap containing the laundry detergent into the washing machine drum. For environmental reasons not all bottles are equipped with a measuring cap, it is available free of charge on ariel.info website.