We now have an alternative kind of "packages", called bundles. The bundles create a unique reservation ID for each bundled item, and the items can have a different duration which means you can use them for example for a weekly all-inclusive trip including one or more hotel along the route and attractions/tours for each day of the trip. For the items which shouldn't have a fixed duration (e.g. a massage therapy which you want to include to be used at any time during the stay), you can also include coupons into the package. The new bundles work on the meta site level so you can include items from independent providers. See Q261
for more info and differences between bundles and packages.