Just Say Boop. Customize your bottle in Betty Boop style. Zip up your cold beverage in your Betty Boop 3.5mm neoprene bottle hugger. This bottle hugger adds extra insulation for your coldest bottled beverage in addition to adding extra support with a heavy duty rubber bottom. Boop Oop-a-Doop. Fits 12-ounce bottles. Officially licensed.