The 1L stem bag is roomy enough to carry a 1L bottle, a small camera or plenty of snacks. It’s a versatile bag that stays on our bikes year-round, to keep the essentials at hand on bikepacking trips, while commuting or riding to the shops.  

— made-to-order from a selection of durable, waterproof fabrics
— two pocket options : symmetrical and flat or unilateral and elasticated
— holds a 1L bottle
70 euros

Materials and functions

The 1L stem bag is made with durable fabrics on the outer, a light-coloured nylon ripstop liner and a thin, closed-cell foam padding in between.  

It is available with two pocket options :

  • two symmetrical pockets, one on each side
  • an unilateral elasticated, pleated pocket


The outside pockets add extra storage for a phone, more snacks and other small items. 

  • Materials 

The 1L stem bag can be made from a selection of deadstock or recycled fabrics. Any of the fabrics listed below can be used for the three panels that compose the bag : the front and back pannel, the side pannels (x2) and the side pockets.

— Sunbrella Marine Acrylic Canvas

 320.0 g/sqm

Sunbrella Marine fabric is an impregnated waterproof acrylic woven fabric that is initially made for boat protection. It’s UV, salt and mould resistant so will hold its colour and strength even after being exposed to the elements for a long time. 

This acrylic canvas has a soft and matte appearance, close to cotton, which gives it a timeless look, while still being durable and more abrasion resistant than cotton. 

— X-Pac 

X-Pac® is a performance laminate fabric. The fabric uses a proprietary multi-layer lamination technology that makes it highly durable and strong, 100% waterproof, and very stable with low bias stretch. 

— Challenge Sailcloth Ecopak 

(288.0 g/sqm)

This fabric laminates a 100% recycled polyester outer fabric together with a UV-stable, highly waterproof ripstop recycled polyester. The strong, blue CrossPly polyester fibres that lye in a diamond shape between the layers increase the tear resistance and prevent the material from stretching in all directions. This fabric has a slightly shiny surface which gives it a technical appearance. 


You can test out different fabric combinations in the window below. Please note that monitors all have different colour calibrations. The fabric swatches displayed above and the bag panels below are for guidance only. Please check the Example section below for more thorough depictions.

This builder is for experimentation purposes only. To order a bag, please visit the 1L stem bag shop page.

Specs and details

Capacity : 1L

Weight: ~ 95g, depending on the fabrics

Dimensions: 9 x 9.5 x 16 cm


  • body : X Pac, Ecopak or Sunbrella
  • front pocket : durable, stretch mesh, black (260g/sqm)
  • side pockets : X Pac, Ecopak or Sunbrella
  • top : waterproof mini-ripstop 100% polyamid (150g/sqm)
  • liner : ripstop Nylon (70g/sqm)


Here is a selection of custom-made 1L stem bags with a variety of fabrics.

Composition and care

Hand-wash only.

Wipe off stains with a damp cloth.

Store in a well-vented space.