Want to update Temporary Table in SQL

Create proc Test 
@Items nvarchar(MAX)
as begin
Create table Products
(Items nvarchar(MAX),
Category nvarchar(255)
)
INsert into Products (Items,Category)
select top(20) Items,Category from dbo.new_products where Items Like '%'+@Items+'%'

Update Products Set Category='Others' where Category=NULL

Select * from Products
Drop Table Products
end