ASOBU® Green Explorer 2-In-1 Tumbler Mug. An extra-large tumbler mug for Ice coffee or smoothie? Yes please! Provides insulation for your cold beverage and features a see-through window so you'll know when you need a refill. The Explorer also features an easy sip lid and a securely stored reusable straw, with triple layer design for your extra frosty iced macchiato. The dual function lid fits both the large tritan body and the insulated sleeve that can easily be removed for an on-the-go hot travel mug. 34 oz clear mug. 25 oz tritan travel mug.