I found a bag similar to this one on Pinterest (of course) and it’s a paid pattern. I cannot figure out why, because unless someone doesn’t understand basic crocheting, this bag was incredibly easy.
However, if you’re compelled to have a pattern, I have written one, and I won’t charge anyone for it (although I’ll probably post the bag itself here: https://www.etsy.com/shop/AddledMabs around late September)
Use an H sized hook, for a bag about 10 inches tall and 8 inches wide at the top.
Chain 15 in white
Row one: Half double crochet (hdc) all stitches across, ch. 2 and turn.
R2: *2 hdc in first stitch, hdc across, and 2 hdc in the last stitch. *
R3-R6 repeat previous row (from * to *) Fasten off and leave a LONG end, which you will use to sew up the sides when finished.
Change color to orange
R7-R12 repeat row 2 .
Fasten off and leave a LONG end, which you will use to sew up the sides when finished.
R13: change to yellow and repeat row 2
R14-R18 repeat row 2 again. Fasten off and leave a LONG end, which you will use to sew up the sides when finished.
Now you’ve completed one side of the bag. Repeat the entire construction again and then sew the sides together, using the long ends of each color. Flip inside out so that your stitches don’t show, and then begin the straps. I used two, because crocheted straps can be kind of flimsy, and then I created thick straps. I used this: https://www.youtube.com/watch?v=v7Lr8jmExok