Container

A Container is just a Frame. It has all the properties that a normal Roblox Frame has.

Example

Here's how to create a Container, change it's size and to make it blue:

e.Container({
    Size = UDim2.new(0.5, 0, 1, 0),
    BackgroundColor3 = Color3.fromRGB(0, 0, 255),
    Child = --[CHILD WIDGET GOES HERE]
})