Flip open, sip and close up tight. The leakproof Transit Flip Top Mug is lightweight, slim and made for your commute. Drop in your backpack or bag, or slide it into most car cupholders. It&';s ready to travel. The 16-ounce Transit Flip Top Mug has premium AeroLight(TM) technology that makes it significantly lighter than standard stainless steel. Featherweight spun-steel with vacuum insulation keeps your drink at the right temperature for hours. Matching silicone at the lid tab and footpad makes opening, closing and setting it down quieter. Maximum of 20 units allowed per order. Feel free to combine colors!