A boxy bag with a twist
(no english instructions, but comes with a video tutorial in german that's clear enough even without the words.)
If you want to make a bag with an inserted contrasting triangle (like the white/silver one),
look at the schematics for "Geo-Bag Patchwork", that shows where to cut the pattern pieces and where to add seam allowances (Nahtzugabe) when sewing the fabric pieces together
Pattern also appeared in the nr 29 german edition of MollyMakes with online downloadable german instruction and templates