To create a new savings bucket, navigate to the Money Tab (bottom left). Then scroll down to the Buckets section. Click the "+" to add a new bucket.
You can manage your buckets by tapping on the Manage button in this section.
Creating a new bucket allows you to choose from a variety of common, pre-set ideas, as well as the option to customize your bucket and icon to whatever you'd like. You have the ability to set a target amount for your savings goal, as well as the option to set a target date to make sure you reach those goals on time.