The company is introducing clear blue bottles and cups across its brands including Calypso Clear, Calypso Natural Mineral Water Ice, Calypso Splash and Sparkling Calypso Clear.
The packaging will feature clearer nutritional information and aims to reinforce Calypso's new health positioning and promote the role of its products as hydration for children.
Calypso, which manufactures products for four- to 16-year-olds, acted following pressure from critics and regulators in the food and drinks industry to respond to the obesity crisis.
Calypso marketing director Richard Cooke said the company had been forced to make the changes as "junk food and sugary pop" are no longer acceptable.
"Hydration has moved to the top of the agenda, with children being particularly vulnerable to dehydration," he added.
Cooke said that sales of flavoured natural mineral waters are predicted to grow by 46% in the children's sector and Calypso wanted to market its brands to parents and children, while at the same time addressing concerns about child health.
Last month, the company announced it was launching Calypso Icicles, a range of colourless freeze drinks for summer to appeal to teen-agers and adults.
In January, Calypso boosted its ethical credentials with the launch of a Fairtrade pure orange juice for kids' lunchboxes.
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