Hidden Brew Secret Storage Mug
Looks like your favorite cup of coffee. Hides a little more than caffeine.
This realistic coffee cup opens to reveal a hidden storage compartment that's perfect for keeping small valuables tucked out of sight. The removable whipped cream insert conceals the opening, making it blend naturally into your desk, kitchen, or coffee bar.
Whether you're storing cash, jewelry, spare keys, or other small essentials, it's a clever hiding spot that's as fun as it is practical.
Product Information
Every FlatLine 3D product is carefully produced, inspected, and packaged before it leaves our shop.
Made to Order
Most products are made specifically for your order rather than pulled from warehouse inventory. This allows us to offer a growing selection of colors, finishes, and customization options.
Need a different size or color?
Most designs can be customized. Send us a message before placing your order!
Materials
Our products are created using high-quality materials selected for the intended use of each design, including:
PLA – Ideal for decorative items, collectibles, and many everyday products. PLA offers excellent detail, a smooth finish, and is derived from renewable plant-based resources.
PETG – A durable, impact-resistant material with increased flexibility and heat resistance, making it a great choice for functional and everyday-use items.
ABS – A strong, heat-resistant engineering plastic commonly used for products that require added durability and toughness.
The material used for each product is listed on its individual product page.
Print Characteristics
Because each item is individually manufactured, slight variations may occur. Minor layer lines, subtle texture differences, and small dimensional tolerances are a normal part of the production process and contribute to the unique character of every piece.
Colors
We do our best to accurately represent product colors. Due to differences in screen settings, lighting, and availability, actual colors may vary slightly.
Assembly
Some products may require minimal assembly upon arrival. If assembly is required, it will be clearly noted in the product listing.
Print Finish Options
Some products are available in multiple print finish options. Lower layer heights produce a smoother surface but require additional production time. Higher layer heights print faster and may show more visible layer lines. Unless otherwise noted, these differences are cosmetic and do not affect the product's intended use.
Questions?
If you have any questions before placing an order, we're always happy to help.
Shipping Info
Last Updated: July 2026
Processing Time
Most FlatLine 3D products are made to order, which means they're created specifically for you after your order is placed.
Unlike mass-produced products that sit on warehouse shelves, each item is produced specifically for your order, inspected for quality, any necessary assembly is completed, and then carefully packaged before it's shipped.
Most orders ship within 3–7 business days.
Processing times may be longer for custom orders, personalized items, larger orders, or during periods of high demand. If your order is expected to take longer than usual, we'll let you know as soon as possible.
If your order includes multiple items, they may ship together once everything is complete.
Need your order sooner? If you're working with a deadline, send us an email before placing your order. We can't promise miracles, but if there's a way to get your order out sooner, we'll do our best to make it happen.
Shipping Methods
Shipping options and rates are calculated automatically at checkout based on your order's size, weight, and destination.
Once your order ships, you'll receive a shipping confirmation email with tracking information so you can follow your package's journey.
Delivery Estimates
Delivery estimates begin after your order has shipped and are provided by the shipping carrier.
Please note that the processing time (typically 3–7 business days) is separate from the shipping carrier's delivery time.
While we do our best to get your order out quickly, FlatLine 3D cannot guarantee delivery dates and is not responsible for delays caused by:
Weather
Carrier delays
Holidays
Customs processing
Incorrect shipping addresses
Other circumstances beyond our control
Shipping Addresses
Please double-check your shipping address before placing your order.
If an order is returned because of an incorrect or incomplete address, additional shipping charges may apply before it can be reshipped.
Lost or Damaged Packages
If your package arrives damaged or appears to be lost during transit, please contact us as soon as possible.
For damaged shipments, please include:
Your order number
Photos of the damaged item(s)
Photos of the shipping box and packaging
We'll work with you to resolve the issue as quickly as possible.
Local Pickup
If you are in the Joplin area and would like to pick up your items, select Local Pickup at checkout. You'll receive an email (or text) when your order is ready, along with pickup instructions.
Questions?
If you have any questions about shipping, processing times, or your order, please don't hesitate to contact us. We're always happy to help.
Terms of Service
Last Updated: July 2026
Welcome to FlatLine 3D! By accessing or purchasing from this website, you agree to the following Terms of Service. Please read them carefully before placing an order.
1. General
FlatLine 3D offers original, licensed, and custom-made products, along with 3D printing services. By using this website, you confirm that you are at least 18 years old or are using the site with the permission of a parent or legal guardian.
We reserve the right to update these Terms of Service at any time without prior notice.
2. Products
Many products are made to order. Because of the manufacturing process, minor variations may occur, including:
Slight color differences between batches.
Minor surface imperfections or visible layer lines.
Small dimensional tolerances.
Slight variations in finish or texture.
These characteristics are a normal part of the manufacturing process and are not considered defects.
3. Product Images
We strive to accurately represent our products through photographs and digital renderings. However:
Colors may appear different depending on your screen.
Accessories shown in photos may not be included unless specifically stated.
Lifestyle photos are for demonstration purposes only.
4. Custom Orders
Custom orders are created according to the information provided by the customer.
Customers are responsible for:
Reviewing all submitted information before approval.
Confirming spelling, measurements, colors, and design details.
Ensuring they have permission to reproduce any copyrighted or trademarked material they provide.
Once production has begun, custom orders cannot typically be modified or canceled.
5. Pricing
Prices are subject to change without notice.
Prices listed at the time an order is placed will be honored for that order.
6. Payment
Payment is required before production begins unless otherwise agreed upon.
Orders may be canceled if payment cannot be successfully processed.
7. Shipping
Estimated production and shipping times are estimates only.
FlatLine 3D is not responsible for shipping delays caused by carriers, weather, customs, or other circumstances outside our control.
Customers are responsible for providing an accurate shipping address.
8. Returns & Refunds
Please refer to our Return Policy for complete details.
Custom and personalized items are generally non-returnable unless they arrive damaged or incorrect due to our error.
9. Product Use
Many products are intended for decorative or novelty purposes.
Unless specifically stated otherwise:
Products are not toys.
Products are not intended for children under 14 years of age.
Small parts may present a choking hazard.
Customers are responsible for using products safely and appropriately.
10. Intellectual Property
All original FlatLine 3D designs, photographs, logos, branding, descriptions, and website content remain the property of FlatLine 3D.
Licensed models remain subject to their respective creators' licensing terms.
No content may be copied, reproduced, or redistributed without permission.
11. Limitation of Liability
FlatLine 3D shall not be liable for indirect, incidental, special, or consequential damages arising from the use or inability to use our products or website.
Our maximum liability shall not exceed the purchase price of the affected product.
12. Order Refusal
We reserve the right to refuse or cancel any order at our discretion, including but not limited to:
Suspected fraud
Pricing errors
Licensing conflicts
Requests that violate applicable laws or intellectual property rights
13. Contact
If you have any questions regarding these Terms of Service, please contact us through the contact information provided on this website.
Print Quality Option Disclaimer
Products may be offered in multiple print quality options. Lower-quality settings may display more visible layer lines or surface texture in exchange for reduced cost and faster production. These differences are cosmetic and do not necessarily affect functionality.Licensed Designs
Some products sold by FlatLine 3D are created under commercial licenses from independent designers. Credit is provided where required by the applicable license. Unless otherwise stated, the purchase of a physical product does not include ownership of or rights to the underlying digital design.Return & Refund Policy
We want you to be happy with your purchase. If you're not completely satisfied, you may return eligible items within 10 days of delivery.
Return Eligibility
To qualify for a return:
The item must be in new, unused condition.
The item must be returned in its original packaging whenever possible.
Return requests must be submitted within 10 days of delivery.
Return Shipping
Customers are responsible for return shipping costs.
Once the returned item has been received and inspected, a refund will be issued to the original payment method. Original shipping charges are non-refundable.
Custom & Personalized Orders
Custom, personalized, and made-to-order items are not eligible for return, exchange, or refund unless they arrive damaged or defective.
Damaged or Defective Items
If your order arrives damaged or defective, please contact us within 7 days of delivery and provide photos of the item and packaging.
If the issue is determined to be the result of manufacturing or shipping damage, we will provide a replacement or refund at no additional cost.
3D Printed Product Notice
All products are 3D printed. Minor layer lines, slight color variations, and small surface imperfections are normal characteristics of the manufacturing process and are not considered defects.
Questions?
If you have any questions regarding your order, please contact us before initiating a return. We're always happy to help.
