Every size option is a stainless steel tumbler.
The 20oz option comes with "school approved" lids as well as a tumbler lid with straw.
The 30oz comes with a tumbler lid and straw.
The 4 in 1 can koozie is a 15oz tumbler with lid and straw and can be switched into a can cooler that can hold normal beer/soda cans, skinny cans AND beer bottles. The best bang for your buck!