Tonic and Club Soda Are Not the Same Mixer

Seedlip's US Grove Spritz recipe says to pour 2 fl oz Grove 42 over ice and top with tonic water or club soda. It offers two choices, not two names for one liquid. The topper quantity is not specified, so the shopping list already has an unknown. The mixer identity is the other decision: on current US producer pages, tonic and club soda can have different ingredients, sugar and sodium even when both are clear and sparkling.

To show why the choice matters, this guide compares two named Schweppes US products at the same 12 fl oz volume, using the producer's current online panels. These figures belong to Schweppes, not to all tonic waters or club sodas.

Keep the product name beside the numbers

The exact panel is more informative than “clear mixer.” Schweppes lists quinine in the tonic ingredients and not in Club Soda. Its tonic lists high fructose corn syrup; its Club Soda does not. The two products also have different sodium figures. The table shows why swapping one name for the other changes what goes into the glass; it does not decide an individual's dietary choice or describe the finished spritz.

There is a serving-size subtlety. The Schweppes site describes Club Soda in more than one context, and online product sections can carry different panel sizes. We use the site's 12 fl oz Club Soda panel and its 12 fl oz Tonic Water panel for the comparison above; always check the actual package. If the bottle in your store declares nutrition per 8 fl oz, compare on that common volume instead of placing its numbers unadjusted beside a 12-ounce panel.

For the Grove Spritz, the unmeasured “top” prevents a total sugar or sodium calculation for a finished glass. We know the source's 2 fl oz of Grove 42; we do not know how many ounces of either mixer the reader will add. Even with a known mixer panel, no defensible finished-drink nutrition result follows until the topper amount is measured. Ice and glass size also affect how much liquid fits. Do not fill those blanks with a typical bar ratio and attribute it to Seedlip.

The practical decision is to put tonic or club soda on the shopping list explicitly. Then inspect that product's ingredients, serving size and package volume. If you want to reproduce Seedlip's method, build over ice and top as the brand says, but recognize that the two authorized mixers yield different documented ingredient lists. “Either” in a recipe means the cook is allowed to choose; it does not mean the label consequences disappear.

This is a model for reading other mocktail instructions too. When a recipe names alternatives, preserve the fork. A mixer is not a neutral container for bubbles—it is a product with its own panel and volume.