Drinks stay hot or cold: our double-walled, vacuum insulated stainless steel mugs come with an open port lid and will keep your dHrinks the temperature you want! The standard lids contain a straw friendly open port drinking hole. Sliding lids and flip top lids are available in our options and add ons section. (15oz/20oz handled mugs, 16oz pint tumblers, and 22oz skinny tumblers come with sliding lids as standard. Bottles have a screw on lid with a flip top spout) Engraving is permanent, but it is not recommended for dishwasher use. We do not use vinyl, decals, or wraps on our mugs! Each is powdercoated for extreme durability!