Here’s an simple project to create some handlebar storage from up-cycled packraft fabric scraps, a short length of small-dimension webbing or paracord, and a bar-end plug. A fabric width of 3″ and a length of about 10″ works with both carbon fibre and alloy handlebars. Completed weights are under 10 grams (excluding items). The first image: L-R; bacon fork and 5 strips, super glue & applicator, 11 speed quick link, 4 – 7″ 50# zip ties, complete spare tubeless valve stem, core, and cap, spare valve core, valve core wrench, completed DIY handlebar roll ready for use. If using a different type of fabric test it first to ensure that it has the dimensional stability to hold items and smoothness to allow for easy insertion into your handlebar.
Completed roll with some typical quick-access items 
Cutting fabric scrap to 3″ width 
Drilling hole through one side of plug. 
Threading 3″ length of 1/4″ webbing through hole in bar plug. Fold a sealed end in half to make insertion easier/possible. 
Welding the end of the roll that will first be inserted into the handlebar 
Welding one side of webbing/plug assembly into place. 
Welding second side of webbing into place. 
Double sewing webbing to fabric to provide enough strength for regular usage 
Completed project loaded with the items shown in the first picture. 
Fold end of roll in half to close and then slide packed roll into bar end. 
Roll inserted and plug seated.