Patent ID: 7854938

Claim:
A preparation-at-use device comprising: (1) a first compartment formed from a first concave opening in a sheet material sealed by a releasable liner and a second compartment formed from a second concave opening in the sheet material and sealed by the releasable liner, wherein the first compartment and second compartment are distant from each other; (2) a pre-formed hydrogel component packaged in the first compartment; the pre-formed hydrogel component comprising a gelling agent and a solvent; and (3) a benefit component packaged in the second compartment; the benefit component comprising at least one compound that is unstable when contacted with the pre-formed hydrogel component; wherein the first and second compartments are separately packaged prior to use, and wherein the device comprises an area of weakness in the sheet material, said area of weakness positioned between the first compartment and second compartment.