Made of Stainless Steel. Measuring 3.6''*3.9''. Available in silver, black. It won't rust, leak, or break easily, ensuring your drink stays fresh and secure wherever you go. An ideal present for bridesmaids, groomsman, dads, best man, maid of honor, wedding party, graduates, Father's Day, birthdays, gender reveals, fishing, hunting, camping, and more. Add your business name or logo to get maximum exposure. Shipping via sea for the last two price tiers.