Can one guarantee kudos from one’s guests every time one mixes a St-Germain Spritz?

One can, and here’s how: always mix them in this custom glass carafe with precise fill marks for Champagne, St‑Germain and Sparkling Water. Which allows one to craft a St‑Germain Spritz with aplomb. If one does not have aplomb at time of purchase, one will develop it after crafting approximately two batches. Which basically means that if you buy a mini carafe, you’ll get aplomb thrown in. Absolutely free.

300mL carafe yields about one and a half perfect cocktails per batch.