Elevate your 3D-printed fashion with this completely no-sew crossbody bag. Designed to be printed flat and assembled in minutes, this bag is the ultimate fusion of utility and modular design.
Whether you are looking for a sleek single-color accessory or a vibrant multi-color masterpiece, this file is optimized for high-end results.

Snapmaker U1: Optimized for multi-color TPU printing. Included project files feature modifiers to help you create stunning color patterns on the flap.
Bambu Lab H model (AMS/AMS lite): Compatible with TPU printing setups for multi-material enthusiasts. I'll design and slightly smaller one to fit the 256x256 bed.
Any 3D Printer: Can be printed as a stylish single-color piece on any standard machine capable of printing TPU.

**Features & Specifications**
Completely Modular: Since the bag uses hardware instead of permanent rivets or stitching, you can swap the flap, strap, or base at any time to match your outfit.
Dimensions: Approximately 7.5" W x 5" H when folded.
No-Sew Construction: Simply fold the sides and "braid" the strap through the integrated slots—no needle and thread required!

**Hardware & Assembly**
To complete the professional look, you will need the following:
Twist Lock: [I used these](https://www.amazon.com/Sexy-Sparkles-Silver-Purse-Twist/dp/B01KVZPMC4/ref=sr_1_2?crid=1R5A7VF9JJB7Z&dib=eyJ2IjoiMSJ9.chkSFa8MYsT3SzhyLwEvTAaqWjy20oeEAtG-dmXcSRwB8s4wxJ3DmBViUBP8rnRT.vIavjY3gb8MfWSw8Jlrisc2P_6l3P1lixCzw3eUWCTg&dib_tag=se&keywords=Twist+Turn+Lock+28x37mm&qid=1768431077&sprefix=twist+turn+lock+28x37mm%2Caps%2C142&sr=8-2)
Chicago Screws: [I used these](https://www.amazon.com/dp/B0D4LRT7ZM)  (The holes are also compatible with rivets if you prefer a permanent bond).

**What’s Included**
Main Bag Base, Flap, and Strap STLs.
Project files with pre-set modifiers.
Standalone modifier files for flap customization.

1/17/26 Bambu .3mf file added. It's basically the STLs shrunk to 92.34% and the strap printed at 19mm high. The same hardware all fits. 
1/20/26 added images for Bambu prints

Modular No-Sew TPU Crossbody Bag (Flat-Pack Design)

sachel plain bag.3mf

sachel fold base.stl

bambu sachel single color.3mf

When I saw the Strong TPU Strap by Turbopstros (https://www.printables.com/model/1451354-strong-tpu-strap-parametric), I had a vision. That's where this bag comes in. I created my version of the TPU strap which is in this file. 
Join me in creating a stunning, unique tote bag with this 3D-printed kit! This project combines 60 PLA flat rings with flexible TPU straps and a sturdy 3D-printed bag base to form a chic, interwoven design. The final product is a durable and stylish bag, perfect for carrying your essentials. If you choose, you can add a lined pouch for added privacy.

This design is a great way to blend 3D printing with crafting, using simple leather rivets to hold the beautiful braided structure in place.

Assembly Instructions (Braiding and Riveting)
Materials Needed:

60 x PLA Flat Rings (Included in file)
1 x Bag Base (Included in file) printed with fuzzy skin
TPU Strips (Print 4 of the included TPU strip file)
2 pieces @ 43" (Handle Strips)
5 pieces @ 25.5" (Horizontal Body Strips)
8 pieces @ 13" (Vertical Body Strips)
34 pairs of 6mm leather rivets

Tools: Hole punch, scissors, and rivet pliers (recommended for easier access).

Detailed Video Instruction: For a step-by-step visual guide, please check out the linked video instruction on my YouTube channel

Assembly Steps:

Prepare the Strips: Cut the 4 printed TPU strips into the lengths specified above for the handles, horizontal body, and vertical body strips.

Attach Handles and Vertical Strips to Base: Slide the 2 handles and the 8 13-inch strips into the slots around the bag base. Punch holes and attach these strips evenly around the perimeter of the bag base using a total of 24 leather rivets (12 pairs). Ensure the strips are secured.

Start the Braiding (Horizontal): See video.  After each round, you'll need to connect the 25.5 inch strip with a pair of rivet. 8 pairs on each side of the bag. 

Weave and Secure the Rings: Continue adding the PLA rings and weaving the horizontal strips, working your way up the bag. The rings should be held in place by the tension of the interwoven strips.

Secure Horizontal Strips: Once the main body is woven, secure the ends of the five horizontal strips to a vertical strip or the bag base using the remaining 12 leather rivets. The weaving action itself is the primary mechanism holding the bag together.

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Modular No-Sew TPU Crossbody Bag (Flat-Pack Design)

Interwoven Rings and Strap Tote Bag