I have a product (150 EUR/month or 1800 EUR/year) and there is a warranty packaging with it.   The warranty packaging is mandatory to take.   You will get the deposit back later when you return the packaging.  (a kind of pallet)

Next to this is about a subscription.  The first year one gets 10 euros discount per month on the product (but not on the warranty) Someone an idea how I can best approach this?