VEVOR Slush Frozen Drink Machine, 6LX1 Tank, 450W Commercial Margarita Maker with 14°F to 41°F Temperature Preservation, Automatic Clean Four Selectable Modes for Cafes Restaurants, Red
You can leave margarita mix stay cold in the slushy maker as long as the the time when the machine turns on. But it is recommended to clean the machine at night and let it rest overnight.
It doesn't matter if it doesn't shake violently. The first time it was done that way is because the transportation is far away and the violent shaking or upside down requires sedimentation. It is fine to carry it regularly and stably.