Snailax Massage Mat, Memory Foam 10 Motors with Heat 363M Bottled water often carries an expiration or best by date, but pure water itself does not expire or spoil, as it lacks nutrients for bacteria growth. The date primarily concerns the plastic bottle: Full Body Electric Massage Mat Cushion Back Massage Pad w Heat Vibration Timer Carepeutic Targeted Zone Deluxe Full Body Vibration Massage Mat with Heat Academy YES WB water based personal lubricant