Student or Learner
"Tide Coldwater is liquid detergent."
"Tide Coldwater is fluid detergent."
Do both sound good?
"a container of Tide Coldwater"
"a case of Tide Coldwater"
"a reservoir of Tide Coldwater"
Do these sound good?
(I bought this type of Tide yesterday. This is famous detergent in the US, isn't it?)
IT is famous here, and in the US, where it is the No. 1 brand I believe.
"Fluid" would only be used by chemists and physicists, ordinary people would use "liquid" here, as opposed to "powder" or "solid."
You could call it a jug, a tub, a container or a bottle of liquid Tide.
A case would mean a cardboad box having many jugs inside. A reservoir would be a huge, underground tank big enough for several million litres.