Are You an butterfinger? If Yess, then this is just perfect!
This Cup grips to any smooth, flat,solid surface when you accidentally bump into it, cup magically lifts up naturally.
Top Rack Dishwasher Safe
Heat Keep: 3-4 Hours
1.it is not a vacuum mug,and it can keep water heat in 3-4 hours.
2.It is normal there is a smell when you open the new lid,it will be OK after you dip in hot water 2-3 times.
3.It sucks on the smooth place well,try to pull the sucker on the bottom slightly if it does not suck well.