Can I continue using the drawer-type cart?

In general, the answer is no. We don't recommend using a drawer-type cart, because the Parcely shipping selection widget does not fit into a drawer and you might face some user interface problems in the future.

But you could hide or replace the Checkout button from the Drawer-cart and direct customers from the Drawer to the Page cart. With this solution, your customer would still see a product added to a nice drawer, but would pass by the page cart page to select the shipping location.