ChemSan 2.5 litre — the best-value size for very active home brewers or brewing clubs. This large bottle of professional-grade no-rinse sanitiser will last through many dozens of brew sessions. At 1ml per litre, a 2.5-litre bottle produces an enormous 2,500 litres of sanitising solution.
See also: Full ChemSan Size Range. Also compare: StarSan | VWP Cleaner.