Our Whistler tumblers are double-wall vacuum-insulated and come with a lockable leakproof lid. These tumblers can be engraved with your logo. Customizations are laser engraved and will show up as stainless steel silver that shines clearly against the powder-coated tumbler. Send your logo to hello@lamose.com. We will email you proof of design for you to review, edit, and approve. We can also provide stainless steel straws with silicone tips. Just ask us about it when you send your logo!