Patent ID: 8066117

Claim:
A method of preparing a preparation-at-use device for delivering a skin benefit agent comprising the steps of: a. providing the device comprising: i. 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 and wherein an area of weakness is positioned between the first compartment and second compartment; ii. a pre-formed hydrogel component packaged in the first compartment; the pre-formed hydrogel component comprising a gelling agent and a solvent; and iii. a skin benefit agent packaged in the second compartment; b. removing the releasable liner sealing the first compartment and second compartment; and c. folding the sheet material along the area of weakness to transfer the pre-formed hydrogel from the first compartment into the second compartment.