Get a Contigo Autospout Sheffield Vacuum-Insulated Stainless Steel Water Bottle, 22-Ounce , its a better bottle and cheaper at about $20. I am not impressed with my Coldest Water Bottle or its optional top that you are inquiring about. The Contigo comes with an integrated one hand flip out sipper that real Engineers designed…. an excellent design. It does not leak and keeps the water / ice cold as long as the Coldest Water Bottle.