CWRIEB 20oz Sublimation Tumblers 8-Pack White — Flat-Edge Insulated Skinny Cups Pre-Coated for Heat-Transfer

The CWRIEB 8-pack 20oz flat-edge sublimation tumblers are straight, double-wall stainless-steel cups pre-coated for heat-transfer printing and sold with lids, straws, silicone bases, and individual gift boxes.

These white, skinny 20oz tumblers are engineered for dye-sublimation customization and everyday insulated use. Each cup features a polymer coating that accepts heat-transfer inks, a completely straight profile to make full-wrap designs easier, and a flat bottom that keeps the sublimation wrap tidy. The set includes handy accessories—sliding lids, metal straws with brushes, silicone bases, shrink film, and windowed gift boxes—so you can finish and present completed tumbler projects right away.

How do these tumblers simplify full-wrap sublimation designs?

The straight, identical-diameter top-to-bottom shape eliminates tapering that can distort wrap-around art, while the flat edge at the bottom prevents excess ink pooling and ensures a clean lower margin. The factory polymer coating is formulated to bond with dye-sublimation inks when heat and pressure are applied, giving consistent print results across the full exterior surface.

• Uniform straight-wall profile for seamless full-wrap placement
• Flat bottom keeps sublimation film aligned and mess-free
• Pre-applied polymer coating ready for heat-transfer inks
• Consistent diameter helps with jigs, wraps, and templates

What equipment and settings work best for transferring designs?

You can use either a convection oven with shrink-wrap or a heat-press machine depending on your workflow and production volume. For heat-press transfer we recommend 334°F for about 50 seconds; for convection oven transfer with shrink-wrap, try 300°F for roughly 6 minutes. Always test with one tumbler first and follow your ink and paper manufacturer's guidance.

• Heat press: ~334°F (168°C) for ~50 seconds
• Convection oven with shrink wrap: ~300°F (149°C) for ~6 minutes
• Use shrink film for tighter, crisper transfers and fewer blemishes
• Perform a test run to dial-in time and temperature for your setup

Will these tumblers keep drinks hot or cold?

Each cup is constructed with double-wall vacuum-insulated stainless steel to reduce temperature transfer, making it suitable for both hot and cold beverages in everyday use. While insulation helps maintain beverage temperature, exact retention times vary with ambient conditions and fill temperature.

• Double-wall vacuum insulation reduces heat exchange
• 20oz capacity fits most drink holders and daily needs
• Stainless-steel interior for durability and easy cleaning
• Sliding lid and silicone base help minimize spills and slipping

What comes in the 8-pack and how are they packaged?

The kit is designed for small-batch creators and gift-makers: eight tumblers with lids, eight metal straws plus cleaning brushes, eight silicone bottoms to protect surfaces, shrink film for oven transfers, and eight windowed white gift boxes for presentation. Everything arrives ready for immediate sublimation or as a complete gift set after personalization.

• 8 × 20oz sublimation-ready tumblers with polymer coating
• 8 × sliding lids and 8 × silicone base protectors
• 8 × metal straws and straw-cleaning brushes
• 8 × shrink film sleeves and 8 × windowed white gift boxes

Who is this for? These tumblers are ideal for crafters, small-shop makers, event vendors, and anyone who wants to produce multiple personalized insulated cups quickly. They suit hobbyists learning sublimation, small businesses offering custom drinkware, and gift creators who need ready-to-decorate tumblers that come with presentation-ready boxes and practical finishing accessories.