Vodka is best when drank straight from the bottle, room temperature.
The quality of the vodka is more about the material of the bottle than the vodka itself. Fancy vodka from a plastic bottle tastes like ass. Cheap vodka from a glass bottle tastes….. well it tastes like vodka is supposed to taste. Won’t say it tastes “good” but you don’t drink vodka for the taste anyway. You drink vodka to get fucked up.