Hi  Ghanna

I know you asked for cream but here is the description for milk... it is the same process.

"UHT milk is fresh milk, which has been processed with a technology called UHT (Ultra High Temperature). The UHT treatment ensures maximum microbic inactivation, while preserving the maximum flavor, taste, and nutritional value. The aseptic packaging system protects the product from air and light and guarantees long shelf life without the need for refrigeration"

I sometimes work in very remote places where fresh milk and cream cannot be obtained because everything must be flown in.  If you bring in cases of UHT via ship it is much cheaper and you always have it on hand.  It does not have to be kept chilled until it is opened.  I hope this helps.