Insulated container with folding closure

1. An insulated container assembly comprising:

an insulated wall structure having a chamber defined therein;

said insulated wall structure including a main body of said container assembly, said main body having a rectangular bottom wall with radiused corners, and an upstanding peripheral sidewall extending upwardly from said bottom wall co-operating to form a five-sided open topped box;

said upstanding peripheral sidewall having an outer layer and a layer of insulation mounted within said outer layer, said outer layer extending around said insulation and defining a waterproof barrier;

said upstanding peripheral sidewall having a lower margin mated to said bottom wall and an upper margin distant from said bottom wall;

said main body of said insulated wall structure including a liner mounted within said insulation, and said chamber being defined within said liner;

said chamber having an opening;

said container assembly including a closure mounted to said insulated wall structure, said closure being movable between an open position and a closed position to govern access to said chamber;

said closure including a cap, said cap having a first periphery mated to said upper margin of said insulated wall structure, a second periphery defining an opening through said cap, and a skirt extending between said first periphery and said second periphery;

said second periphery having a first margin and a second margin;

said skirt being foldable;

said skirt having a layer of insulation located between said first periphery and said second periphery;

in said closed position of said closure, said first and second margins of said second periphery of said skirt of said cap being matingly secured to each other, and said skirt being at least partially folded; and

in said open position, said skirt being more unfolded than in said closed position, and at least a portion of one of said margins of said second periphery of said skirt of said cap being located more distant from said wall structure than in said closed position;

said second periphery has a tracked fastener having corresponding first and second portions mounted to said first and second margins of said second periphery respectively, said first and second portions of said tracked fastener being mutually engaged when said closure is in said closed position;

in said closed position said tracked fastener running from end to end of said second periphery thereby securing said closure from end to end thereof;

said insulated main body of said container assembly having a length and a width and a depth, said length being greater than said width, said tracked fastener being mounted to run predominantly lengthwise relative to said insulated main body of said container assembly;

at least said first margin of said second periphery of said skirt of said cap has a first stiffener mounted thereto, said first stiffener running lengthwise;

said first stiffener being located between said tracked fastener and said insulation of said skirt of said cap, said insulation extending along said stiffener lengthwise, and laterally away from said stiffener toward said first periphery of said skirt of said cap;

said tracked fastener being longer than said length of said insulated main body and said stiffener being longer than said insulation of said skirt of said cap.

2. The insulated container assembly of claim 1 wherein:

said first margin of said second periphery of said skirt of said cap is longer than said insulated main body of said container assembly;

said first margin of said second periphery of said skirt of said cap extends lengthwise beyond said insulation of said skirt of said cap; and

said first margin of said second periphery is folded into a triangular flap at each end of said first portion of said tracked fastener, said triangular flap being lengthwise beyond said insulation of said skirt of said cap.

3. The insulated container assembly of claim 2 wherein said tracked fastener is a waterproof zipper, and when said zipper is closed said insulated container assembly is waterproof.

4. The insulated container assembly of claim 1 wherein at least one of said first margin and said second margin defines a U-shaped jaw.

5. The insulated container assembly of claim 4 wherein both said first margin and said second margin define a respective U-shaped jaw, and said respective U-shaped jaws are symmetrically operable and opposed.

6. The insulated container assembly of claim 1 wherein said body of said container is RF welded.

7. The insulated container of claim 1 wherein:

said first periphery has a join to said main body, said join being RF welded;

said main body is rectangular, having a pair of first and second spaced apart long sides and a pair of first and second spaced apart short sides;

said first periphery bends hingedly at said join to said main body.

8. The insulated container of claim 7 wherein said stiffener defines a jaw bone.

9. The insulated container of claim 8 wherein said first jaw bone is attached to a floating hinge.