You can edit the items in the shopping cart until confirming the order by clicking on Complete order. 

The items remain in the shopping cart for 7 days from the user's last activity on our e-shop. After this period of time, the shopping cart will automatically empty. 

The items in the cart are not reserved. The items are reserved only once the order is completed - by clicking on Complete order.

When re-entering your shopping cart, you might be notified that some items are no longer available in the required amount and you will be asked to adjust the quantity of the items to be able to complete the order.