Botanical drops are a different formulation challenge than bitters. No bitter backbone needed. No alcohol as a carrier. You're building flavor into a dense, shelf-stable, non-alcoholic delivery system. Different rules apply.
Your tea and hibiscus Botanical Drops live in a completely different product space than a bitters formula. No alcohol. No required bitterness. Instead, you're working with water-based extractions, VG for body, sucralose and Ace-K for sweetness, and acid structure (citric or malic) for brightness. The carrier system changes everything about how compounds behave.
Without alcohol as a solvent, your options for dissolving nonpolar compounds (terpenes, esters, essential oils) are limited. PG can carry them, and that's why PG is in the formula. But VG is a weaker solvent for nonpolar compounds. Water dissolves almost none of them. This means the compound families you can access in a botanical drops formula skew toward the water-soluble side: acids, sugars, pigments (anthocyanins in a hibiscus), some alkaloids, and whatever the PG carries.
The formulation challenge: how do you create a complex, interesting flavor profile when your solvent system limits which compound families you can dissolve?
Hibiscus Drop uses the same carrier system (VG + sweetener + preservative) but makes two key changes. First, the core ingredient is hibiscus instead of tea. Hibiscus is dominated by anthocyanins (polyphenol pigments, red color, mild astringency) and organic acids (tartaric, citric, malic). It has a bright, berry-like, cranberry-adjacent profile that's fundamentally different from tea's tannin-forward character.
Second, the lead acid switches from citric to malic. Why? Malic acid has a slower onset and rounder curve than citric. It builds rather than spikes. Hibiscus's aromatic compounds benefit from a slow acid build that lets the berry-like character develop rather than getting overwhelmed by a sharp citric hit. Same structural role (brightness, preservation, volatile enhancement). Different kinetics.
This acid selection is a formulation choice that most people would miss. Citric and malic are both "sour." But how they're sour matters for which compounds they support.
If you wanted to create a third Botanical Drop, here's the compound-level thinking:
Start with the ingredient. What's the core botanical? What compound families does it carry? Is it terpene-forward (like ginger or citrus), tannin-forward (like tea), or polyphenol-forward (like hibiscus)?
Match the acid. If the ingredient is bright and fast (citrus-adjacent), citric acid complements. If the ingredient is rounded and slow (berry, floral), malic acid lets it breathe. If the ingredient is complex and layered, acid phosphate adds structure without a strong sour character.
Decide on sweetness. Sucralose + Ace-K is your proven base. But if the ingredient has natural perceived sweetness from esters or furanones, you might be able to reduce the sweetener level and let the aroma carry more of the sweetness load.
Check what you're missing. In a water/VG/PG system, terpenes are hard to carry. If the ingredient's character depends on terpene volatiles, you might need PG as a co-solvent to keep them in solution. If the character depends on water-soluble compounds (like hibiscus anthocyanins), water does the job.
What you need: Any fruit juice or tea concentrate, citric acid, malic acid, two cups, sucralose or sugar.
Neither acid is "better." They have different kinetics. Citric acid punches. Malic acid rolls. The right choice depends on the ingredient you're supporting. Fast, bright ingredients (citrus, black tea) want citric. Rounder, slower ingredients (berry, hibiscus, stone fruit) want malic. This is why Tea Drop uses citric and Hibiscus Drop uses malic. The acid is matched to the compound profile of the core ingredient.