PACKAGING

1 . A container body which comprises a base and a side wall extending from the base, wherein said container body includes a polyester and a polymer YY.

2 . A container body according to claim 1 , wherein said polymer YY is such that when dosed at 1 wt% into PET as described in Examples 1 to 4 and bottles produced as described, the transmission, measured as described in Example 4, is reduced to less than 50% of the transmission of the PET alone.

3 . (canceled)

4 . A container body according to claim 1 , wherein the difference between the Tg of the polyester and that of said polymer YY is at least 30° C.; and/or wherein said polymer YY has a Vicat Softening Temperature (VST) measured by ASTM D1525 of at least 110° C.; and/or wherein the difference between the Tg of the polymer YY and said polyester is at least 30° C.

5 . (canceled)

6 . (canceled)

7 . A container body according to claim 1 , wherein said polymer YY is selected from the group comprising cyclic block copolymers (CBC) and cyclic olefin polymers (COP).

8 . (canceled)

9 . A container body according to claim 1 , wherein said polymer YY is CBC, wherein said CBC comprises vinyl aromatic monomer units, wherein the hydrogenation level of each vinyl aromatic monomer unit block is greater than 90%; and said CBC includes a conjugated diene monomer unit and the hydrogenation level of the conjugated diene monomer unit is greater than 95%; and/or wherein said CBC has the structure

where R1 and R2 are end groups, and a, b, c, x and v are integers in the range 1 to 100.

10 . (canceled)

11 . A container body according to claim 1 , wherein said polymer YY includes a repeat until of general formula

wherein n is an integer; and/or wherein polymer YY is a COP which includes less than 10 mol% of repeat units of structure —CH 2 CH 2 —.

12 . (canceled)

13 . A container body according to claim 1 , wherein:

a ratio (B) defined as the weight of polyester divided by the weight of polymer YY in a layer of the container body is in the range 8 to 32; said container body is defined by a single layer; and said container body includes 88.0 to 94.0 wt% of polyester, 3.0 to 6.0 wt% of polymer YY and 1.0 to 7.0 wt% of other ingredients.

14 . (canceled)

15 . (canceled)

16 . A container body according to claim 1 , wherein:

the sum of the wt% of thermoplastic polymers in said container body is at least 88 wt% and the sum is less than 99 wt%

; said container body includes a first light shielding pigment which is zinc sulphide; and

said container body includes less than 8 wt% of said first light shielding pigment; and includes at least 1 wt% of said first light shielding pigment.

17 . (canceled)

18 . (canceled)

19 . A container body according to claim 16 , wherein:

-said container body includes less than 2 wt% of titanium dioxide; and

said container body includes a second light shielding pigment which is a particulate metal.

20 . (canceled)

21 . A container body according to claim 19 , wherein said container body includes less than 0.050 wt% of said second light shielding pigment; and the sum of the wt% of light shielding pigments in said container body is less than 5 wt%.

22 . (canceled)

23 . A container body according to claim 1 ,

wherein said container body includes 88-93 wt% polyester, 1-6 wt% zinc sulphide, 3-7 wt% of polymer YY, 0.01 to 0.2 wt% of particulate aluminium.

24 . A container body according to claim 1 , wherein

said container body includes 88-93 wt% polyester, 2-5 wt% zinc sulphide, 4-7 wt% of polymer YY, 0.01 to 0.10 wt% of particulate aluminium.

25 . A container body according to claim 1 , wherein:

said container body is part of a beverage container, having a volume of no more than 5 litres; and

a sidewall of said container body has a thickness of at least 100 microns; and less than 500 microns.

26 . A container body according to claim 1 , wherein:

-said container body has a light transmission (LT%) at 550 nm as described in Test 3 of less than 1.0%; and/or said container body comprises a base, a side wall extending from the base and a neck portion arranged to engage a closure for the container body, wherein said container body includes a polymer YY and polyester, wherein the side wall of the container body has an L* of at least 90 and the neck portion has an L* of at least 84.

27 . (canceled)

28 . (canceled)

29 . A container comprising a container body according to claim 1 , wherein a closure is secured to the container body; and said container includes a beverage which includes at least 0.1 wt% fat and/or is a milk.

30 . A preform for making a container body, according to claim 1 , the preform comprising:

(i) a polyester;

(ii) a polymer YY.

31 . A preform according to claim 30 , wherein:

-a ratio (A) defined as the weight of polyester divided by the weight of polymer YY in the preform is in the range 8 to 32; and/or said preform includes 88 to 96 wt% of polyester, 3 to 8 wt% of polymer YY and 1 to 7 wt% of other ingredients; and/or

comprises a first light shielding pigment which is zinc sulphide (ZnS) and a second light shielding pigment which is particulate metal.

32 - 36 . (canceled)

37 . A formulation for use in a method of making a preform according to claim 30 , the formulation comprising a polymer YY, wherein said formulation includes 55-64 wt% polymer YY, 30-45 wt% of a first light shielding pigment which is zinc sulphide and 0.10-0.50 wt% of a second light shielding pigment which is particulate metal.

38 - 41 . (canceled)

42 . A container body according to claim 1 , which comprises a base and a side wall extending from the base, wherein:

said container body includes PET and a polymer YY;

said polymer YY is selected from the group comprising cyclic block copolymers (CBC) and cyclic olefin polymers (COP);

a ratio (B) defined as the weight of PET divided by the weight of polymer YY in a layer of the container body is in the range 15 to 25;

said container body is defined by a single layer; and

said container body includes 88.0 to 94.0 wt% of PET, 3.0 to 6.0 wt% of polymer YY and 1.0 to 7.0 wt% of other ingredients.

43 . A container body according to claim 42 , wherein:

said container body includes 88-93 wt% PET, 2-5 wt% zinc sulphide, 4-7 wt% of polymer YY and 0.01 to 0.10 wtt% of particulate aluminium.

a closure is secured to the container body; and said container includes a beverage which includes at least 0.1 wt% fat and/or is a milk.