This bag is very simple and easy, with so many color combination possibilities.
I used an H hook and Red Heart Super Saver Yarn, but any hook and yarn size would work, it just alters the size of your bag. This is a little bit rough explanation. Beads are optional but add a nice touch.
Make 5 basic granny squares (you can find several styles all over the net) in any size you like, mine were only 3 rnds for this. Use one for the base and then attach one on each side of square ane then sew up sides.
For Top closure
RND 1) attach yarn in any spot of a square and DC evenly around each of 4 square tops, sl st to first dc
RND 2)ch3 (counts as first dc and ch1 space) skip next st,* dc in next st, ch1, skip next st, repeat from * around, sl st to second ch of beginning ch3
RND 3) DC in each st around, st st to first dc, fasten off and weave in ends.
I made two drawstrings of about 70chs long and weaved in and out of RND 2. I also added some beads to each end of drawstring.