An article comprising: a food or beverage container, or a portion thereof, having: a metal substrate; a coating composition disposed on at least a portion of the metal substrate, the coating composition comprising a polyether polymer that is substantially free of bisphenol A or the diglycidyl ether of bisphenol A and is formed by reaction of ingredients including: (i) a diepoxide compound that includes one or more segments of the below Formula: wherein: each of the oxygen atoms depicted in Formula is present in an ether linkage; each R 1 is independently a hydrogen atom or X and one or more R 1 can optionally join R 2 or another R 1 to form a cyclic group; each X is independently a group having at least one carbon atom or a sulfur-containing group; each of the phenylene groups depicted in Formula includes at least one X attached to the carbon ring at an ortho position relative to the depicted oxygen atom; R 2, if present, is a divalent group; and n is 0 or 1; with the proviso that if n is 0, the phenylene groups depicted in Formula can optionally join to form a fused ring, in which case each of the depicted phenylene rings includes three R 1 groups; and (ii) an extender selected from polyhydric phenols, preferably dihydric phenols; polyacids, preferably diacids; phenol compounds having both a phenol hydroxyl group and a carboxylic group; and combinations thereof. a metal substrate; a coating composition disposed on at least a portion of the metal substrate, the coating composition comprising a polyether polymer that is substantially free of bisphenol A or the diglycidyl ether of bisphenol A and is formed by reaction of ingredients including: (i) a diepoxide compound that includes one or more segments of the below Formula: wherein: each of the oxygen atoms depicted in Formula is present in an ether linkage; each R 1 is independently a hydrogen atom or X and one or more R 1 can optionally join R 2 or another R 1 to form a cyclic group; each X is independently a group having at least one carbon atom or a sulfur-containing group; each of the phenylene groups depicted in Formula includes at least one X attached to the carbon ring at an ortho position relative to the depicted oxygen atom; R 2, if present, is a divalent group; and n is 0 or 1; with the proviso that if n is 0, the phenylene groups depicted in Formula can optionally join to form a fused ring, in which case each of the depicted phenylene rings includes three R 1 groups; and (ii) an extender selected from polyhydric phenols, preferably dihydric phenols; polyacids, preferably diacids; phenol compounds having both a phenol hydroxyl group and a carboxylic group; and combinations thereof. (i) a diepoxide compound that includes one or more segments of the below Formula: wherein: each of the oxygen atoms depicted in Formula is present in an ether linkage; each R 1 is independently a hydrogen atom or X and one or more R 1 can optionally join R 2 or another R 1 to form a cyclic group; each X is independently a group having at least one carbon atom or a sulfur-containing group; each of the phenylene groups depicted in Formula includes at least one X attached to the carbon ring at an ortho position relative to the depicted oxygen atom; R 2, if present, is a divalent group; and n is 0 or 1; with the proviso that if n is 0, the phenylene groups depicted in Formula can optionally join to form a fused ring, in which case each of the depicted phenylene rings includes three R 1 groups; and each of the oxygen atoms depicted in Formula is present in an ether linkage; each R 1 is independently a hydrogen atom or X and one or more R 1 can optionally join R 2 or another R 1 to form a cyclic group; each X is independently a group having at least one carbon atom or a sulfur-containing group; each of the phenylene groups depicted in Formula includes at least one X attached to the carbon ring at an ortho position relative to the depicted oxygen atom; R 2, if present, is a divalent group; and n is 0 or 1; with the proviso that if n is 0, the phenylene groups depicted in Formula can optionally join to form a fused ring, in which case each of the depicted phenylene rings includes three R 1 groups; and (ii) an extender selected from polyhydric phenols, preferably dihydric phenols; polyacids, preferably diacids; phenol compounds having both a phenol hydroxyl group and a carboxylic group; and combinations thereof.