- Tumblers are laser engraved, no vinyl is used, so the engraving is permanent and will never come off. - Each cup is custom-made to order. - Tumblers are made of food grade stainless steel. - Vacuum insulated construction can be used for both hot & cold liquids. - Narrower bottom to fit most cup holders. - Seamless construction = no leak points. - Once order is placed send me your logo and I will follow up with a draft for your approval prior to engraving and shipping your tumblers to you. I will begin working on your order as soon as you respond. - All logos/designs will go through your final inspection. Please check font, spelling, and/or design for approval. Once approved by you, no refunds/changes will be accepted.