Name of customers who have ordered Cocktail Glasses by online sales channel.
"Cocktail Glasses" is the Product Name; customer refers to Customer Names
SELECT T FROM ( SELECT DISTINCT CASE  WHEN T3.`Product Name` = 'Cocktail Glasses' AND T2.`Sales Channel` = 'Online' THEN T1.`Customer Names` END AS T FROM Customers T1 INNER JOIN `Sales Orders` T2 ON T2._CustomerID = T1.CustomerID INNER JOIN Products T3 ON T3.ProductID = T2._ProductID ) WHERE T IS NOT NULL