Hello! 1) Full volume is about 6oz 2) Noted! 3) Correct, the tumbler skips the titanium because it's our more affordable product and it's less needed because th

Hello! 1) Full volume is about 6oz 2) Noted! 3) Correct, the tumbler skips the titanium because it's our more affordable product and it's less needed because the product does not have a stem.