Mixing package

Claim 1

A package comprising a tube of flexible material having a first and second end, a first seal extending transversely across the tube and closing said first end, a second seal extending transversely across the tube and closing said second end, a chamber formed by said tube and said end seals for containing contents, hollow stem dispensing means extending through and supported by said second seal with an inner end inside the tube and an outer end outside the tube, means closing the outer end of the stem, a second package contained within said chamber to form an inner package while the first-said package forms an outer package, said inner package comprising a tube of flexible material closed at its ends by seals that form a second chamber containing second contents, with the seals of the inner package being weaker than the seals of the outer package, a third package contained within the first-said chamber, said third package comprising a tube of flexible material closed at its ends with seals that form a third chamber containing third contents, with the seals of the third package being stronger than the seals of the second package, with the inner end of said stem extending into the chamber of the third package, the contents of the first and second packages forming a temperature-changing reaction when mixed together, whereby the outer package may be squeezed to rupture a seal of the second package and mix its contents with the contents of the outer package to form a reaction which changes the temperature of the contents of the third package, and whereby the stem closing means may be opened and the outer package may be squeezed to dispense the temperature-changed contents of the third package.