This is a pack of Birthday Blowouts or party noise makers. They are classic, and have a paper disk with the top half of running Sonic on it, along with the logo. Notice the familiar purple packaging, these are also by the company CA Reed , who made a lot of other Sonic party supplies you see here. These are copyright 1993, likely the same general time they released everything else. These are uncommon as well, being a 'disposable' item.