This is pretty easy:
string[] lines = File.ReadAllLines(@"drinks.txt");
for (int i = 0; i < lines.Count(); i++)
{
Button btn = new Button(){Name=string.Format("Button{0}", i), Text = string.Format("{0}", {lines[i]), Size = new Size(90, 24), Location = new Point(10, (24*i) + 4)};
this.Controls.Add(btn);
}