Beverages in Guam

Dry, blended loose-leaf teas — including herbal, green, black, and chai blends — are shelf-stable products with water activity well below 0.85. Similarly, whole-bean and ground coffee sold in sealed, dry packaging is shelf-stable. These are among the simplest beverage products to produce and sell from a licensed home kitchen.

Blends must consist entirely of dry ingredients. No liquid additions, no fresh herbs that would introduce moisture. If your blend includes dried fruit pieces, ensure they are fully dehydrated to prevent moisture transfer over time.

Shrubs — mixtures of fruit, sugar, and vinegar — are naturally high-acid with pH typically well below 4.6. When properly made, they are shelf-stable and one of the few beverage categories that can be sold at room temperature. Drinking vinegars and simple syrup concentrates (sold as mixers, not ready-to-drink) fall in the same zone.

The key distinction: shrubs sold as concentrates or mixers (the buyer adds water) are simpler to handle than a ready-to-drink beverage. Confirm your pH with a calibrated meter before selling — and if offering a ready-to-drink version, treat it as a TCS beverage requiring refrigeration.

Cold brew coffee is a TCS beverage — it has water activity above 0.85 and must be kept refrigerated below 41°F at all times. Unlike brewed hot coffee served immediately, cold brew is stored and sold as a packaged refrigerated product, making proper cold-chain management essential.

Under Guam's Home Industry framework, licensed home sellers can produce and sell refrigerated cold brew, provided their home kitchen has passed DEH inspection and they maintain cold storage at point of sale — including at markets and events. Cold brew packaged in sealed, labeled bottles is the standard format.

Fresh, unpasteurized juice sold in a sealed container to consumers is one of the most regulated beverage categories under federal FDA rules — rules that apply in Guam as a US territory. The FDA requires that juice processors either pasteurize their product or implement a HACCP (Hazard Analysis and Critical Control Points) plan achieving a 5-log pathogen reduction. This applies to any juice sold in sealed containers, including calamansi juice, coconut water, fresh fruit blends, and green juices.

For small-scale home sellers selling directly to consumers for immediate consumption — e.g., a fresh calamansi juice squeezed to order at the Chamorro Village Night Market — FDA's regulations are less restrictive. But packaged juice with a shelf life sold in bottles requires FDA compliance. Fresh juice sold same-day at an event without packaging is a different situation.

Kombucha presents a unique regulatory situation in Guam. It is a live-culture fermented beverage that is naturally acidic (pH typically 2.5–3.5 when finished), but it is also carbonated and TCS — it must be refrigerated to slow fermentation and maintain safety. Additionally, kombucha can exceed 0.5% alcohol by volume (ABV) during fermentation, at which point it may technically fall under alcohol beverage regulations rather than food regulations.

Most US states that permit kombucha under cottage food laws require monitoring to ensure ABV stays below 0.5%. Guam's DEH would apply the Guam Food Code's fermented beverage standards, and there may be additional considerations from Guam's alcoholic beverage licensing authority if your kombucha regularly exceeds 0.5% ABV.

Made-to-order specialty lemonade, agua fresca, hibiscus drinks, calamansi-based beverages, and similar fresh-mixed non-alcoholic drinks sold immediately at a market booth are among the most practical beverage options for Guam home sellers. The key is that these are typically mixed and consumed on-site — they are not packaged for later retail sale.

For event sales of fresh-mixed beverages: obtain a TFSE Sanitary Permit from DEH, keep all perishable ingredients cold (below 41°F), use clean equipment, and discard any mixed beverage not sold within 4 hours at ambient temperature.

Simple syrups — high-sugar, high-water solutions — are TCS products requiring refrigeration unless they are also high-acid (pH ≤ 4.6). Switchel (a vinegar-ginger-honey drinking concentrate) and similar acidified beverage bases can achieve shelf stability through their vinegar content, similar to shrubs. Plain simple syrups without added acid must be refrigerated and labeled accordingly.