In a family, everyone drinking coffee doesn't mean everyone likes the same type of coffee. Some like it bitter and bold, others pay more attention to aroma and a clean flavor; some brew phin, some use a machine, some only drink a small amount on weekends. So the challenge isn't finding a product that satisfies everyone perfectly — it's finding a way to organize choices so the family's differences don't turn into an overly large, hard-to-manage lineup.

Taste differences need to be named accurately

Before buying more products, a family should identify where they actually differ. If one person wants a clearly bitter flavor while another dislikes bitterness, that's a sensory difference. If one brews phin while the other uses a machine, that's a difference in brewing method. If one drinks daily and the other only on weekends, package size also becomes a factor worth considering.

Research on coffee consumer preference shows that groups of drinkers can form different preference patterns. This matters because it reminds buyers that "family taste" isn't necessarily a single point on the map. Before looking for a shared product, identify the attributes that actually cause disagreement.

Find the overlap before expanding the lineup

If several family members can accept a shared flavor range, brewing method, or level of convenience, that overlap should be prioritized. For instance, if everyone likes a moderately bold flavor and only differs in brewing method, a product suited to both methods may be enough.

This approach has the benefit of reducing the number of decisions needed. A lineup with many products but vague differences forces buyers to learn too much information. Research on the number of choices shows that increasing the number of options doesn't always make decisions better; task complexity and how choices are presented also affect the choosing experience.

When a single shared product is the sensible choice

A shared product works when the difference between members isn't too large, or can be adjusted through brewing. The same type of coffee can produce different experiences by changing the amount of coffee, grind size, water ratio, or extraction method. However, don't rely on adjustability to force genuinely opposing preferences into a single product.

A practical criterion is to ask: if you buy just one product, how many people would actively drink it without feeling like they're compromising? If most members accept it and only small differences remain, a shared product benefits from cost, storage simplicity, and ease.

When two small options beat one middle-ground option

If preferences differ significantly, trying to find a product that sits "in the middle" sometimes creates a result no one actually likes. A type too bitter for one person could be too mild for another; a balanced flavor profile may not resolve that difference at all.

In that case, two smaller options may make more sense if the family drinks often enough to avoid leaving coffee open too long. The two products should also differ clearly in what need they serve, rather than differing only in name. One option for someone who likes it bold and one for someone who likes it clean is more meaningful than two nearly identical bags.

Organize choices so the whole family doesn't have to learn the whole lineup

A family's lineup should be organized around actual needs: someone who likes it bold, someone who likes balance, someone who needs convenience, someone with a grinder, or someone who drinks infrequently. Each group only needs a few easy-to-understand attributes.

What matters is not proposing a "standard" number of products for every family. Existing research doesn't allow us to conclude that every family should have two, three, or four types of coffee. The reasonable number of choices depends on how different tastes actually are, drinking frequency, storage ability, and cost. A small lineup with clear differences is usually easier to use than a large lineup where the boundaries between products aren't clear.

A useful approach is to have each person describe their need in specific words instead of simply saying they like it "good" or "bold." Someone who likes it bold might be looking for pronounced bitterness, a thick body, or a strong roast aroma; these three characteristics aren't entirely the same thing. Someone who likes it light might want less bitterness, clear aroma, or a cleaner drinking sensation. Once the attributes are separated, a family can find overlap more easily and avoid buying multiple products just because of different naming.

Cost should also be calculated based on actual amount consumed, not just the number of bags. If a member drinks very little but has their own separate bag, the remaining coffee could sit open for a long time. Conversely, if two people have similar preferences and share a product, consumption speed increases and storage becomes simpler. This is why deciding a family's lineup should combine taste with frequency, rather than relying solely on stated preference at the time of purchase.

References

• Geel, L., Kinnear, M. & de Kock, H. L. (2005). Relating consumer preferences to sensory attributes of instant coffee. Food Quality and Preference, 16(3), 237–244. https://doi.org/10.1016/j.foodqual.2004.04.014
• Heidema, J. & de Jong, S. (1998). Study on preference differences between consumer groups. Food Quality and Preference, 9(3), 115–118. https://doi.org/10.1016/S0950-3293(97)00042-6
• Chernev, A., Böckenholt, U. & Goodman, J. (2015). Choice overload and the complexity of the choice task. Journal of Consumer Psychology, 25, 333–358. https://doi.org/10.1016/j.jcps.2014.08.002
• Samoggia, A. & Riedel, B. (2018). Motivation and attributes in coffee consumption behavior. Appetite, 129, 70–81. https://doi.org/10.1016/j.appet.2018.07.002