You can add more than one item to your upcoming singles order as long as you do so up to 60 mins before the delivery slot. All you have to do is
Log into the cure.fit app
Go to Plan
To-do, go to the date on which you’ve placed the order
Tap the Add items option on the order you have placed
Pick and add the items
If the add items option is disabled, you can just place a fresh order but the item/s might arrive separately.