Abstract: A lid assembly is disclosed for drink containers. An example lid assembly can include a lid and a slider. The lid includes a sip hole, a first lid flat portion, and a first lid recess portion having a first track on a side wall adjacent to the first lid flat portion. The slider includes a winged extension configured to fit the first lid flat portion, and a central portion configured to fit the first lid recess portion. The central portion includes a first tab on a side of the central portion to engage the first track. The lid further includes a first lid step portion from the first flat portion that restrains the first winged extension from sliding out of the first track and a nose recessed portion at the end of the first lid recessed portion that allows the slider to be inserted.