Epoxy Tumbler Guide for Beginners

Epoxy has become a popular choice among crafters, handmade product sellers, and anyone looking to create personalized drinkware. By combining epoxy resin with materials like glitter and vinyl stickers, crafters can transform ordinary tumblers into colorful custom epoxy tumblers with unique design effects.

For beginners, understanding the basics of epoxy tumblers is an important first step before starting a project or choosing the right blank tumbler. This guide will help you learn what epoxy tumblers are, what materials you need, the basic creation process, how to choose the right tumbler, the differences between epoxy resin and sublimation, and bulk epoxy tumblers.

What is an Epoxy Tumbler？

Epoxy tumblers are tumblers customized with epoxy resin as a decorative and protective coating. During the customization process, crafters usually start with a blank tumbler, add design elements or decorative materials, and then apply epoxy resin over the surface. This creates a smooth, glossy protective layer that seals the design inside the resin, so the colors won’t fade, peel, or wear off.

Once the epoxy resin fully cures, it creates a hard and durable finish that helps resist scratches and fingerprints.

Why Are Epoxy Tumblers So Popular?

Unlike traditional printed tumblers, epoxy tumblers offer a stronger handmade feel and endless creative possibilities. Crafters can use epoxy resin to create a wide range of designs, including glitter epoxy tumblers, personalized name tumblers, and holiday-themed tumblers.

By combining different colors, textures, and decorative materials, crafters can create one-of-a-kind drinkware pieces that are impossible to replicate.

For customers who love personalized products, epoxy tumblers make great birthday gifts, holiday gifts, and anniversary gifts. For small businesses, they also create an opportunity to sell high-value handmade products. Many customers are willing to pay more for personalized tumblers because each piece feels unique and made just for them.

Tools & Materials Needed

Before making epoxy tumblers, beginners need to prepare some basic tools and materials.

Common supplies include:

• Blank tumblers suitable for epoxy resin projects
• Crystal resin (epoxy resin) and hardener
• Digital scale
• Sandpaper
• Decorative materials such as glitter and vinyl stickers
• Mixing cups and stirring sticks
• Tumbler turner
• Heat gun
• Protective gloves
• Face mask
• Dust cover
• Lint-free cloths and 75% medicalalcohol

How to Make an Epoxy Tumbler？

Step 1: Prepare and Clean the Blank Tumbler

1. Choose a durable stainless steel tumbler with good insulation performance and a surface that works well for customization.
2. Use a lint-free cloth with alcohol to wipe away dust, oil, and fingerprints from the tumbler surface. Let it dry completely before moving on.
3. If the tumbler surface feels too smooth, lightly sand it with sandpaper. This helps improve the adhesion between the epoxy resin and the tumbler.

Step 2: Add the Design and Decorative Materials

1. Mix a small amount of epoxy resin and hardener according to the recommended ratio. Apply a thin layer to the tumbler surface as a “base layer” to hold the decorations in place.
2. Choose a style based on your design idea, then carefully place decorative materials like glitter, vinyl stickers, or dried flowers onto the tumbler surface. Use a silicone scraper to gently press them down and secure them.
3. Wait until the base resin layer partially cures. It should feel sticky but no longer transfer to your fingers before moving on to the next step.

Step 3: Apply Epoxy Resin and Cure the Tumbler

1. Mix the epoxy resin and hardener according to the ratio recommended by the manufacturer. Stir the mixture slowly for 3–5 minutes to prevent air bubbles from forming.
2. Before applying the epoxy, place the blank tumbler horizontally on the tumbler turner.
3. Wear a face mask and protective gloves. As the tumbler slowly rotates, apply a thin and even layer of resin over the surface until all decorations are fully covered.
4. Use a heat gun to remove small bubbles. Keep the heat source moving continuously to avoid overheating any specific area.
5. After removing all visible bubbles, cover the tumbler with a dust cover and let it cure at room temperature for 24–48 hours. (The curing time may vary depending on the decoration method.)
6. Once the epoxy has fully cured, lightly sand and polish the surface if needed to ensure a smooth and even finish.

Best Tumblers for Epoxy

When choosing blank tumblers for epoxy resin crafts, the quality of the tumbler blank directly affects the final result. A high-quality stainless steel tumbler should offer several key benefits:

• A strong and durable body
• Rust and corrosion resistance
• Excellent insulation for both hot and cold drinks
• A smooth surface that makes epoxy coating and creative designs easier to apply

For beginners, choosing the right tumbler shape is just as important as choosing a high-quality blank. A simple and attractive shape makes the crafting process easier to control and helps beginners get started faster.

Here are some high-quality stainless steel tumblers recommended by Fastsub for beginners. You can choose the right option based on your needs:

• 20 oz Skinny Stainless Steel Tumbler: The 20 oz tumbler is one of the most popular choices for epoxy resin customization, especially for beginners and small custom tumbler businesses. Its size is easy to handle, and the straight-sided design makes the crafting process easier to control. It also provides enough surface area for adding decorative elements.
• 20 oz Stainless Steel Tapered Tumbler: The tapered stainless steel tumbler combines an attractive appearance with great performance. Its bottom is slightly narrower than the top, making it comfortable to hold while still offering plenty of space for creative customization. Whether you’re trying epoxy tumbler crafting for the first time or creating custom drinkware for your business, this tumbler is a great choice.

Tips for a Smooth Finish

• Uneven Epoxy Coating: If the epoxy resin layer is uneven or too much resin is applied in certain areas, the finished surface may become bumpy or uneven. To create a smooth, polished finish, apply the resin carefully and keep the tumbler rotating at a steady speed on a tumbler turner during the curing process.
• Bubbles in the Epoxy Layer: Bubbles usually form because of mixing too quickly, improper application techniques, or trapping air during the decoration process. Avoiding these issues can help reduce bubbles. If bubbles still appear, use a heat gun to remove them.
• Accurate Mixing Ratio: Always use a digital scale to measure the epoxy resin and hardener. An incorrect ratio can prevent the resin from curing properly or cause cracks after curing.
• Improve Durability: Hand washing is recommended for epoxy tumblers because dishwashers and high temperatures may shorten the lifespan of the customized surface.
• Allow Enough Curing Time: Even if the surface feels dry, the inside may not be fully cured yet. Handling the tumbler too early can leave marks or cause the surface to deform.

Epoxy vs Sublimation for Tumbler

Epoxy resin is a great choice for creators who want to make unique artistic designs. It offers endless creative possibilities, allowing you to add textures, glitter, layered effects, and 3D decorative elements.

However, epoxy customization requires more skill and takes more time compared with other tumbler customization methods. Beginners need some practice before they can achieve professional-looking results.

Sublimation uses heat transfer technology to permanently print designs onto specially coated tumbler surfaces. This process can create full-color designs, portrait photos, detailed illustrations, and more. It’s also a great option for commercial production because it allows businesses to complete large quantities of custom tumblers quickly while maintaining consistent results.

To learn more about sublimation tumblers, check out our “Sublimation Tumbler Guide for Beginners.”

Which One Is Better?

For most custom drinkware businesses, both methods have practical value, and each one comes with its own advantages. The best choice depends on your specific needs.

Choose epoxy tumblers if you want:

• Handmade designs with a unique style
• Premium custom products
• More room for creative expression
• Small-batch production
  

Choose sublimation tumblers if you want:

• Faster production speed
• Consistent and standardized designs
• High-resolution detailed prints
• Large-volume orders

Bulk Blank Tumblers for Epoxy

For small businesses and professional tumbler crafters, purchasing epoxy tumbler blanks in bulk can reduce the cost per tumbler and increase profit margins.

A stable and reliable inventory also helps businesses complete customer orders more efficiently, expand their operations, and prepare inventory for seasonal collections, event-based custom orders, and new product launches.

Before placing a large order, consider the following factors:

• Tumbler quality
• Insulation performance
• Size accuracy
• Supplier reputation
• Start with a small quantity for sample testing before making a bulk purchase

Ready to Start Your Epoxy Tumbler Project

Epoxy tumblers offer endless creative possibilities for personalized drinkware. With unique designs, eye-catching effects, and a handmade feel, they help creators make custom products that truly stand out.

Whether you’re a beginner starting your first tumbler customization project, a creator making personalized gifts, or a small business building a custom tumbler collection, choosing the right blank tumbler is an important first step.

A high-quality blank tumbler provides a reliable foundation for your epoxy resin designs. Fastsub stainless steel blank tumblers are designed specifically for customization needs, featuring a durable construction, excellent insulation performance, and a surface that works well with epoxy resin applications.

Explore our epoxy stainless steel blank tumblers. We offer a variety of sizes and styles to help you find the perfect blank tumbler to start your epoxy resin project.