A dosing stopper, a filter envelope, a jug of pure water in the refrigerator, and an hour of patience: Summer Yuzu is steeped cold, without a teapot or hot water. It is a green tea iced tea from the French Summer Tea collection by Mariage Frères, designed for teas to drink fresh, in summer and all year round.

The flask in shiny black blown glass, 175 mm high and 85 mm in diameter, holds 160 g of tea and its 10 g dosing stopper. It comes with a pack of filter envelopes and makes between 16 and 24 litres of iced tea. The composition is simple: tea, yuzu, flavouring, with possible traces of nuts.

The yuzu from Japan sets the tone, zesty and clean, and the house describes an airy citrus bouquet in which one recognises clementine, citron, lemon and orange blossom. Cold infusion preserves these notes without drawing out the bitterness of the green tea; the liquor is clear and refreshing, and evokes a citrus granita to be sipped through a straw.

Serve it very cold, in a large glass, with a splash of sparkling water if you like, at lunch, on the terrace or on the way back from the beach. It goes well with grilled fish, a salad or a lemon sorbet.

For 1 to 1.5 litres of water, place 10 g of tea in a filter envelope, close the flaps and leave to infuse in the refrigerator for at least one hour. La Boutique du Thé, official stockist of Mariage Frères since 1999, offers Summer Yuzu in its shops in Bordeaux and Nice; keep the flask closed, away from light and heat.