Carrying reusable cups and mugs should be a simple solution ... stainless steel, this vacuum-insulated dream from KeepCup features a leak-proof, screw-fit sipper lid for all your morning caffeine ...

Cue an insulated coffee ... Finally, the splash-proof lid opened halfway, which was much wider than the other mugs we tested. This wide lid opening makes liquids easier to spill, but it also ...