International freight shipping is incredibly cheap per kilogram (1 TEU/20ft shipping container costs about 6000 euros to ship, with a max eeight of about 28900kg, so about 20 cents per kg), at least by sea and rivers. Many of the costs come from the moment products arrive on land. Land-locked countries and countries with major population centers far away from docks and freight terminals pay the price.

Shipping individual packages within a short amount of time costs money. The solution is to do what companies like Amazon and AliExpress do: stock up products in many different companies in bulk so that packages can be dispatched locally for much cheaper.

Many of the shipping routes between countries go by plane rather than by boat, filling up unused weight in passenger planes or being shipped in bulk by passenger planes. Planes are a lot more expensive, especially by weight, but you'll get your products within days rather than weeks.

If you're a business importing goods in bulk, you'll have to deal with weeks or even months of delays between ordering and delivery, but international cargo delivery per product is essentially free unless you ship things like cars.

Things will become cheaper as warehouses are spread wider and transport legs get optimized more. Currently, there aren't many companies shipping from Italy to Romania, so there aren't many boats or trains making the journey, and shipping is expensive. When demand grows, more availability will follow, and prices will drop eventually.

I understand that for you cheaper shipping options are important, but other people might find other things important. The EU has the capability to address multiple issues at a moment, so it should not be "instead of doing <my favorite thing to make fun of>". btw, shipping to Romania is expensive because infrastructure is still quite bad and the reliability of the national post is quite low. PS: Bottle caps that stay attached to the bottles is great!