Water

Role in the beverage

Water is the entire canvas of the tonic — every other ingredient is measured in drops and pinches against a full glass of it. Chlorine, chloramine, and off-flavors in tap water flatten the bright citrus and mineral notes, and contaminants (lead, PFAS, microplastics) undercut the health purpose of a morning tonic. Warm-not-boiling filtered or spring water is the traditional base for both MB1 and MB2.

Quality criteria

• Certified filtration over marketing claims: look for third-party NSF/ANSI certifications (42 = chlorine/taste, 53 = lead/PFAS, 401 = emerging contaminants/microplastics, 372 = low lead construction). BOROUX is WQA-certified; ProOne is IAPMO-certified. Legacy Berkey elements famously lacked NSF certification.
• Gravity carbon filters (BOROUX, ProOne) keep beneficial dissolved minerals; reverse osmosis and distillation strip nearly everything and the water should be remineralized (a pinch of the salt sole from this recipe, or Trace Minerals ConcenTrace drops, does the job).
• True spring water is the recipe author’s gold standard: findaspring.org maintains a community map of tested, publicly accessible cold springs — bring glass carboys and check the posted water-test results for the specific spring.
• Store filtered or spring water in glass or stainless, not plastic.

Where to buy

BOROUX (boroux.com) is the successor consumer brand in the Berkey ecosystem and the closest like-for-like replacement: the Legacy is a 3-gallon polished stainless gravity system that was listed at $355 (regular $399) with two Foundation filters (~12 months of filtration) when checked July 2026, and unlike old Berkey elements the filters carry WQA certification to NSF/ANSI 42, 401, and 372.

ProOne (prooneusa.com) uses a single ceramic-shell/carbon-core element that also handles fluoride reduction without a separate add-on filter. The Big+ (3 gal, brushed stainless) lists at $298.95 and was 30% off in a summer sale in July 2026 — note the product page says the Big+ is being discontinued (supplies while they last), so the smaller Traveler+ or the newer models may be the long-term option.

Mountain Valley Spring Water delivers Arkansas spring water in returnable 5-gallon glass bottles through ~100 regional distributors; distributor pricing seen in July 2026 ran $33.49–$35.50 per 5-gallon bottle plus a $40–50 refundable bottle deposit — price approximate as of July 2026 since it varies by region. For free spring water, findaspring.org (community map, GPS coordinates, user-posted test results) is the tool the recipe tradition recommends.

Backpacking form

Water is the one ingredient you never carry — filter it in camp. A Sawyer Squeeze or Katadyn BeFree handles biological safety, then boil for the hot tonic. Backcountry filter water and snowmelt are very low in minerals, so a pinch of unrefined salt (already in the mix via the sole ingredient, carried as dry salt) or a mini bottle of trace-mineral drops rounds out flavor and electrolytes.