drip-feed
From Longman Dictionary of Contemporary Englishdrip-feedˈdrip-feed1 verb [transitive] 1 to put a liquid directly into a person’s blood through a tube2 to keep giving someone small amounts of information, money etc The public was drip-fed with news.drip-feedˈdrip-feed2 noun [countable] a piece of equipment used in hospitals for putting liquids directly into your blood through a tube SYN drip