On the mobile app, first click on the Quick Action tab to Add bottles. Once done, you can search on any wine and then check the box. It will remain in the checked state while you search for additional labels and check the box for those results as well. Once you have searched for all the bottles you want to add you simply click on the gold button at the bottom that says, “Add to Collection”.
All the bottles you had checked the box for will then be shown in a list. You can at this point, edit the vintage, number of bottles and even the bottle size. If you want to add additional bottles of the same label, you can select the edit label (3 vertical dots) and duplicate it. Once done, you can edit the vintage, etc.