A fast, scannable cheat sheet for making and selling tumblers the right way. The rules differ by cup type, so we've split them: find your drinkware below and follow that section. Skim it before your next project, or share it with your customers.
Tumblers are one of the most rewarding products a maker can offer — but a beautiful design on the wrong blank, or a great cup cared for the wrong way, can turn a happy customer into a refund request. The key thing to know is that the rules are different for stainless steel tumblers and for glass cans — what's perfectly fine for one can ruin the other. So we've split this cheat sheet by cup type. Find what you're working with below. For the full reasoning behind any of these, see our complete Ultimate Guide to Drinkware.
This covers your insulated stainless cups — travel tumblers, tall skinnies, and sport bottles. They're the rugged, versatile workhorses of drinkware: they take laser engraving and UV DTF beautifully (when powder-coated), handle hot and cold drinks, and last for years when cared for right.
This covers your glass drinkware — the trendy glass can cups and double-wall snow globe cans. Glass is gorgeous and makes designs pop, but it plays by stricter rules than stainless: it's rigid, it's brittle, and it can't have material cut into it. Treat it gently and it'll shine; ignore the rules and it can crack or fail later.
When you fill a glass snow globe can, leave a little air at the top before sealing. That gap lets the liquid expand with temperature changes instead of pushing against rigid glass — which is what cracks it. Acrylic snow globe cups flex and won't crack the same way, but glass needs that air space.
If you remember nothing else, remember this: the cup decides the method. Almost every drinkware mistake traces back to a mismatch between the blank and what was done to it — sublimating the wrong coating, lasering glass that can't take it, or treating a delicate glass can like a rugged stainless tumbler. Start by knowing exactly what you're holding, match your method and your care to it, and the rest falls into place. When in doubt, reach for the gentler option: hand wash, leave the air gap, test one first, and let things cure. Your customers get a cup that lasts, and you build the kind of reputation that brings them back.
No — hand wash decorated drinkware. Dishwashers combine high heat, harsh detergent, and strong jets that can lift transfers, dull engraving, and damage seals or snow globe cavities. Hand washing keeps the design and the cup looking new far longer.
No. Decorative glass cans aren't thick enough to have material removed by laser or etching, which creates a weak point that can crack later. Use UV DTF on glass cans instead — it looks crisp and won't compromise the cup.
Leave a small air gap when you fill the liquid cavity. That space lets the liquid expand with temperature changes instead of building pressure against the rigid glass. Overfilling with no air space is the most common cause of cracking.
Mismatching the blank and the method — like trying to sublimate a powder-coated cup or laser a glass can. The cup's surface determines what decoration works, so always identify your blank before you start.
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