I was looking forward to getting the S'well coffee Tumblers and I am very happy with those, but the Tumbler lid needs major re-work. It does not seal and stay on well risking a hot coffee spill; this could be fixed if it were to screw on. Also and most disappointingly, is the open drinking hole that does not have a plug and again risk of a hot coffee spill and splash; this could be fixed with a flip back open / close for the spout maybe a switch on the rim of the lid for easy one-handed access. Fix these two major setbacks and you would have an outstanding lid for the Tumbler. Charge $20. With these fixes, my wife would buy 5 of these Tumblers / lid combos. Easy homerun product with big profit margins. Fix this!