Describe the product names delivered in 2021 for the customer "Sundial".
delivered in 2021 refer to DeliveryDate LIKE '%/21'; 'Sundial' is the Customer Names
SELECT T FROM ( SELECT DISTINCT CASE  WHEN T2.DeliveryDate LIKE '%/%/21' AND T1.`Customer Names` = 'Sundial ' THEN T3.`Product Name` 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