Ripe apricots are the specific requirement — as with the honeydew melon in the agua fresca and the pear in the pear ginger sparkler, this preparation has no heat concentration to compensate for under-ripe, mildly flavoured fruit. A ripe apricot should yield clearly to gentle thumb pressure, produce a specifically sweet, floral, warm stone-fruit aroma from a few centimetres away, and show a deep golden-orange blush extending across at least half the surface. Under-ripe apricots have a pale yellow-green tinge, firm resistance to pressing, and a specifically mild, slightly astringent flavour without the floral warmth that makes apricot a compelling mocktail ingredient. At the very low heat used in this preparation, there is no cooking-down concentration that would amplify a mild fruit's character — the base will taste exactly as the raw apricots taste in terms of intensity. Cut the apricots in half to remove the stone, then cut each half into 4–6 rough cubes of approximately 1.5cm. The skin is left on — consistent with the kiwi lime, peach rosemary, and pear preparations in this collection — as the apricot skin's concentrated aromatic compounds contribute a depth to the finished base that peeled apricot cannot.

Combine the 80g of honey, 150ml of water, cubed apricots, and the zest of ½ lemon in a small saucepan. Place over the absolute lowest available heat. Stir gently to begin dissolving the honey into the water — the combination of warm water and continued stirring will dissolve it fully within the first 3–5 minutes of the preparation. The temperature target throughout the 15–20 minute cooking period is approximately 40°C — meaning the liquid should feel comfortably warm, not hot, when a clean finger is dipped briefly. No visible steam should rise from the surface; the liquid should not show any simmering movement. At 40°C the apricot's cell walls begin softening progressively, releasing juice and the flavour compounds bound within the fruit's matrix into the surrounding honey-water medium. The honey's reduced viscosity at this temperature also facilitates the absorption of the aromatic compounds into the sugar matrix — the same principle as the pear ginger sparkler where the honey's sugar specifically absorbs fruit aromatic compounds more efficiently than plain water. This temperature is specifically protective of apricot's volatile esters: the lactone compounds (primarily γ-decalactone and δ-decalactone) responsible for apricot's characteristic warm, peach-adjacent, specifically floral stone-fruit aroma begin evaporating at temperatures above approximately 60°C. Maintaining below this threshold for the full cooking period preserves the majority of these compounds in the base. Cook for 10–15 minutes, stirring occasionally, until the apricots have visibly softened — yielding easily to spoon pressure — and are beginning to break down at their edges. The surrounding liquid should be golden, fragrant, and noticeably thicker from the apricot's pectin and natural sugars.

In the final 5 minutes of the cooking period, add the 1 tsp of pure vanilla extract. Stir gently to distribute. Pure vanilla extract is a complex mixture of hundreds of aromatic compounds — vanillin (the primary aromatic, responsible for vanilla's characteristic sweet-warm note) is relatively heat-stable; the dozens of secondary compounds (including various phenols, aldehydes, and organic acids) that produce vanilla's full complex character are progressively more volatile and more heat-sensitive. Adding the vanilla in the final 5 minutes rather than at the beginning reduces the heat exposure of these secondary compounds from the full 15–20 minutes to 5 minutes — preserving a meaningfully larger proportion of the complex aromatic character that makes a good pure vanilla extract smell specifically more interesting than vanillin alone.

Remove the saucepan from the heat. Using the back of a large spoon or a potato masher, press firmly on the softened apricot cubes — working them against the pan's surface until they are fully broken down and the maximum juice is extracted. The apricots after 15–20 minutes at this very low temperature are softened and yielding but not fully collapsed — the mashing provides the mechanical extraction that completes the juice release that the gentle heat alone does not produce. Strain through a fine-mesh sieve over a clean jug, pressing firmly on the apricot and lemon zest solids to extract as much flavoured liquid as possible. Discard the strained solids. The finished strained base should be a clear-to-slightly-hazy golden colour — warm amber from the apricot and honey — with a specifically fragrant, warm stone-fruit and vanilla aroma. Chill completely in the refrigerator — a minimum of 30 minutes.

Fill four wine glasses generously with ice cubes. The wine glass format is appropriate to this mocktail's warm, elegant character — the wide bowl showing the golden colour and providing the space for the apricot wedge garnish to be displayed cleanly. Divide the chilled apricot vanilla base evenly — approximately 70–75ml per glass. Stir briefly against the ice. Top each glass with approximately 125ml of chilled club soda, poured gently down the inner side of the glass. Stir once or twice gently. Prepare the garnish: cut 4 thin wedges from the remaining apricot — approximately 3–4mm thick — and slip each wedge into a glass against the ice so the golden-orange flesh and skin are visible through the drink. Serve immediately.