Articles such as, for example, pipes or bottles, prepared from multimodal polyethylenes possessing a density from 0. The water improves the dynamics of the hoop and makes it easier to keep the hoop elevated by gyration. The sidewall includes a lower frustum section, a narrow mid-section and an upper frustum section. The need for separate tabs to different anode layers is eliminated or at least minimized, thereby reducing capacitor volume, increasing capacitor reliability, and reducing the cost and complexity of the capacitor manufacturing process for multi-anodic capacitors. Specifically disclosed is a hydrogel comprising ionic monomers composed of at least a cationic monomer and an anionic monomer, wherein the component ratio of the ionic monomers is 5 to 20 mol % inclusive relative to the total amount of monomers that constitute the gel, and the content of the anionic monomer is 15 to 25 mol % inclusive relative to the content of the cationic monomer.