I imagine something like that yes. No offense.

No offense taken, don't worry.

I am not sure what the cheapest shampoo is around here, but as far as I can recall, the brand shampoo I usually buy is roughly 3€ (converted) per 250mL bottle. Somewhat surprising that we're paying 1st world country prices in a 3rd world country. I can probably go for a much cheaper one, but I am not sure I can find one that is much cheaper. Most of the really cheap stuff tend to be in bulk, and usually in those big warehouse-like stores that are meant for wholesale buying. This reinforces my point earlier: I can buy cheaper overall, but I have to pay a lot upfront. And when people try to live in under 10€ per day, I don't think it's feasible.

For fairly non-perishable stuff like shampoo, toiletries, detergent, and the like, I guess it really makes sense buying in bulk (or what one can use up in a reasonable amount of time). Food though? That's the first thing that went "single portion sizes" here. Heck, there was a time before "single-use" cooking oil sachets, where we can just buy that stuff to the mL. We just need to bring our own containers and the store will put the appropriate amount on it. Same goes for vinegar and soy sauce (which are basic kitchen staples here). Now? That stuff can be bought pre-packaged in amounts as little as 50mL.