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Prevent the water in bird baths and water features from freezing so that birds can drink and bathe throughout winter with our fantastic new Ice Free for Bird Baths solution. Effective in temperatures down to -4&hordm;C this formula is based on plant extracts and will prevent freezing without harming birds or other wildlife. This product does not contain glycerol or glycol. 50ml of Ice Free will treat a typical bird bath containing 1.5L of water.