All of our tumblers feature double-wall vacuum insulation with a clear lid. The clear plastic push-on lid prevents leakages with a tight outer ring seal and contains a straw friendly open port drinking hole. Engraving is permanent, but it is not recommended for dishwasher use. Please hand wash. All of our tumblers are double wall insulated, heat & cold resistant, BPA and lead-free. We DO NOT use vinyl, decals, or wraps on our mugs! Each is powder coated for extreme durability! Available in different colors and sizes.