I’m choosing to do the champange bottle being opened.
To create this, I would need to create these sounds: Bottle being opened (pop sound effect), cheering after it is opened, fizzing of the bubbles when opened, ambient noises around the restaurant/party and the opening of the bottle with the corkscrew.
This is how I would create each effect. A pop sound effect for the opening of the bottle would be made by simply making a pop sound with your mouth. The fizzing of the bubbles could be difficult, although I’m thinking something like shaking up a bottle of pop and then opening it which would make a fizzing sort of effect. To create the cheering simply me and maybe some others cheering at the same time and then the volume on that lowered as to keep the attention of the viewer on the bottle. For the ambient speaking and noises in the restaurant/party I would just do several recording of me speaking and then layer and decrease the volume to make an environment that feels like a party.