Patent ID: 7951057

Claim:
A method of forming a storage container comprising the steps of: wrapping a receptacle sidewall around a mandrel to form a receptacle; providing a sleeve sidewall having a left edge and a right edge, marginal portions adjacent said left and right edges, and an insulating layer formed on an inner surface thereof wherein said insulating layer has a first edge and a second edge that do not extend under said marginal portions such that said insulating layer has a smaller circumference than that of said sleeve sidewall; wrapping said sleeve sidewall around said receptacle sidewall such that said insulating layer is placed therebetween; meeting a left and right edge of said sleeve sidewall together to form a butt seam and a recessed channel extending along the entire height of said sleeve sidewall; and heat-sealing said butt seam thereby fixedly attaching said sleeve sidewall to said receptacle sidewall.