Travel with team spirit with The Northwest Company"s 15-ounce Everlasting Travel Mug. PolySub is a patented modern marvel of technology for drinkware. This ultra strong lightwieght plastic polymer is dye submlimated for brillian color with sharp detail prints. Officially licnesed product. Is oven safe up to 450 degrees and is top rack dishwasher safe. Made in the USA this travel mug is virtually unbreakable.