You use a Beau Bottle wrap by sliding the sleeve over a Veuve Clicquot 750ml bottle and applying heat with a hairdryer or heat gun to shrink it to a smooth fit. 
Step-by-step instructions
Prep the bottle: Ensure the bottle is clean and at room temperature or chilled.
Slide on the wrap: Open the sleeve and slip it over the bottle. Align the wrap's clear window with the bottle's label, keeping the Beau Bottles logo on the back.
Apply heat: Start by applying heat with a hairdryer on high or a heat gun on medium to the bottom of the bottle. Work slowly and rotate the bottle in a spiral motion.
Work your way up: Continue to move the heat up toward the neck of the bottle. Hold the wrap at the top with one hand to prevent wrinkles as it shrinks.
Smooth the finish: Focus on any wrinkled areas, and if needed, you can pour boiling water over the bottle in a sink for a perfectly smooth finish.