No need to shake. Simply mix with water! Immediately ready for use. Refill twice with only one bottle of refill concentrate. For one bottle of Bottle Cleanser (500ml): Mix 250ml refill concentrate and 250ml water. For baby-friendly and safely cleaning of bottles And teats – NOW with an even better cleaning performance! Removes even stubborn milk proteins, residues of thicker feeds, cereals, tea & juices. Rinses easily without any residues. With naturally based ingredients. Free of perfumes and dyes. pH skin neutral, dermatologically tested. Agents biodegradable. Bottle from 100% recycled material. Practical safety closure. 250ml marking simplifies the dosage. No discoloration of liquid.