Disclosed is a refillable product comprising: a container; two or more first dissolvable solid article contained in the container, which is characterized by a maximum dimension D and a minimum dimension z, wherein said maximum dimension D ranges from 1 mm to 300 mm, wherein said minimum dimension z ranges from 0.5 mm to 150 mm, and wherein the ratio between D and z ranges from 1:1 to 300:1; and an indicia for a user to put the dissolvable solid articles and a liquid carrier into another container.
This provides environment friendly products. For example, by not containing any liquid during transportation, the products can reduce energy consumption for the transportation.