The difference is clear as glass! Introducing our new collection of UNBREAKABLE Outdoor Tumblers that will allow you to entertain with BODUM classic design silhouettes at your next BBQ or poolside gathering! These OUTDOOR Tumblers have the same thermal properties as our glass version, so your hot drinks will stay hot and cold drinks will stay cold for a longer period of time and with no messy condensation rings to worry about! ExpirationThis product has no expiration date or the manufacturer has not provided an expiration date.