As refreshing as eternal snow: this is the promise of Summer Snow, an iced green tea from Mariage Frères' French Summer Tea collection, created for cold infusion. The soft green tea is scented with wild berries, red and black fruits, and lifted by the fresh, piquant edge of lemon.

The ingredients are tea, cornflower and flavouring; the blend may contain traces of tree nuts. The house describes it as a nomadic iced tea, and the format suits it: a glossy black blown glass bottle with its measuring cap, holding 160 g of tea, enough to prepare up to 24 litres, supplied with a pack of muslin tea sachets.

Cold infusion draws out the aromas without the tannins or bitterness. The iced liquor is clear and fruity: the berries and red fruits give an apparent sweetness, the lemon brings the freshness that cuts through, and the green tea stays light in the background. No sugar or syrup is needed.

Serve it in a jug, iced, at children's teatime as well as at adults' aperitif hour, with fresh fruit, a red fruit tart or simply a few ice cubes and a mint leaf. Made the day before, it waits in the cool.

The method takes three steps: one measuring cap, about 10 g, in a muslin tea sachet; the flaps folded closed; at least one hour in the fridge in 1 to 1.5 litres of pure water. Then remove the sachet and serve.