Closure and lid and method of forming closure and lid

An example lid assembly 100 can include a lid and a slider 102. The lid can include a wall 118 defining a recess 122. The slider can be configured to slide in the recess and can be configured to move between a closed position where the slider covers an opening 104 to aid in preventing spilling of contents of the container, and an opened position where the slider uncovers the opening such that the contents may be poured from the container. The slider can be configured to be removable from the lid and can be replaced back on the lid. Additionally, the slider can be formed from upper and lower sled elements 130,136 that are magnetically coupled to one another. In some examples, the lower sled of the slider may include an air vent 1802 with rounded entry portions, and the lid assembly may include engaging members 2170 with ramped surfaces.