High Capacity AMS Silica Dry Box

Update September 2, 2026

Added a “Square” hygrometer version as per a request. This version is untested as I don't have that type of hygrometer myself yet to test with but it should work well. It fits this style of Hygrometer which is 43 x 43 x 12.5 mm with rounded corners. It has a small slide in place lid as the others and a funnel as well. 

As I don't have this hygrometer I've not made any print profiles but use the normal print settings with three walls and 15-25% infill, no supports should be used (it bridges fine). Print it as I have set it.

Update April 17, 2026

Version 1.01 of the box has been released. Changes:

• Added compatibility for Kraken

• Increased flow; revised wall pattern

• Slimmer design without slot, yet same capacity

• Customizable lid in .f3d and .step format for serial number or text

• Print Profiles now available

About

This is a High Capacity Universal Silica Gel Box, it is compatible with all of the AMS systems below:

• Stock AMS

• Stock AMS 2 PRO

• Hydra - Enhanced Bambu Lab AMS

• Hydra - Enhanced Bambu Lab AMS 2 PRO

• Hydra PRO - Advanced Bambu Lab AMS

• Kraken - Revolutionary Bambu Lab AMS

• Kraken - Revolutionary Bambu Lab AMS 2 Pro

One box holds around 70 g of silica gel beads (around 43 g for the Hygrometer version). It uses woven walls for a fast, strong print with limited retractions.

The box uses a sliding lid (no screws) and there is a Hygrometer / Thermometer version available as well.

For easy filling of silica gel, there are funnels available too.

It's also compatible with the Single Piece remixes of Hydra, of course.

About - Continued

This is a set of front mounted Silica Gel Boxes for the AMS. It's compatible with both stock AMS, Stock AMS 2 PRO and Hydra (all versions).

For the lid, there are a few different ones:

• Clean - No print

• “Hydra”

• “AMS”

• “PRO”

• With Hygrometer

• With Serial Number (Customize yourself)

Additionally, there is an .f3d file for the lid available so you can customize the text or for a serial number (if you have one). The font used is named Futura, it's free and can be downloaded here.

The .f3d format is used by Autodesk Fusion. If you're not using Fusion, you can use included .step file instead and add the text yourself, make sure to extrude the text so it can be painted.

Support

All my designs and mods on Printables are free to use and remix. They have a non-commercial license. If you enjoy this or any of my other designs you can send me a small donation using the link below. Thanks :)

https://www.paypal.me/humebeamengineering

Print settings

All parts print without supports and they use the same sliding lid. If you want to you can use the paint bucket tool and paint the letters/numbers.

For the Hygrometer version of the box you will get a warning about floating cantilever but this can be safely ignored, it prints fine and was designed with this in mind.

How do I get a serial number?

All official Hydra supporters are assigned a serial number each. Read more here:

• Hydra - Enhanced Bambu Lab AMS

• Hydra - Enhanced Bambu Lab AMS 2 PRO

• Hydra PRO - Advanced Bambu Lab AMS

For the serial number branded lid, you customize this yourself by downloading this and then editing it in Fusion:

• high-capacity-ams-silica-gel-box-custom-lid-1.01.f3d

BOM - Bill of materials

Silica gel beads.

• 500 g Silica Gel Beads

I bought my beads before I was aware of the colour changing ones so mine are just clear. For the Hygrometer box you also need a small round hygrometer (mini) with a 41 mm diameter which you can pick up from AliExpress for example. I bought a bunch since they're so cheap:

• Mini Digital LCD Thermometer Hygrometer (Round)

How to use and install

Fill the container with silica gel and slide over the lid, it secures itself so no screw is used. The containers are actually very "scoop friendly" so you can also just scoop up the silica gel from your bag to fill it.

There are funnels available if you like to use those, it slides over as well:

Fill up the box then slide the lid over. Top: Normal box. Below: Hygrometer version.

Next, install it between each feeder. 

All done! There are different lids available as the box is universal.

Installed in Hydra - Enhanced Bambu Lab AMS:

Installed in Hydra - Enhanced Bambu Lab AMS 2 PRO:

It also fits the the stock AMS (both original and AMS 2 PRO) as well as Hydra Pro, not pictured here.