Wide Mouth Opening Will Accept Ice Cubes. Use Smaller Sizes For Cooking Oil, Condiments, Dry Goods, Etc. 1 Oz. Size Perfectly Holds Standard Size Strike Anywhere Matches. Bpa-free Hdpe Material. Great For Air Travel: 1 Oz. Size Actually Holds 1.2 Oz. And 2 Oz. Size Holds 2.3 Oz. To The Bottom Of The Neck.