This twin wall insulated mug has a suction base, providing security in busy environments and around the home. The mug has a suction base, making it difficult to tip over if knocked by accident. Use on all flat and non-porous surfaces, such as desks or tables knowing that the clever grip-pad at the base will help reduce spillage occurrence. In order to lift the mug, ensure that you lift straight up. If you try to lift at an angle, in trying to stick to the table the mug may jerk away; causing the contents to spill. The product comes with a lid which is removable for drinking. The lid is fitted with a silicone seal to further reduce spillage potential when on the move and for security on surfaces in busy environments and around the home.