Optima Chrome Travel Mugs - BPA Free. This travel mug has a screw on top that keeps this promotional mug secure and spill proof. The translucent look of this mug gives it a modern appearance that goes very well with a custom imprint or your advertising logo. Travel mugs can be ordered for any event. We've had customers use them for birthday parties, cheerleading tournaments, class reunions, and much more. Having your design custom printed on these mugs lends a sense of credibility to your event or business to potential customers or even random onlookers.