The HydroSHKR holds 24 oz and is [double walled (SHKR and Studded SHKR) or triple layer insulated (stainless)] for insulation and durability. It comes with a Pro Lid and a SHKR grate to easily mix protein or pre-workout, as well as a tumbler lid and a straw so you can drink in a different way. The HydroSHKR is cup holder compatible, has a silicone base, and is BPA Free.