This is my own design.
start with the number of chains according to the size you need
R1 sc in each ch, in last ch 3 sc, turn and sc on each ch till the end and last 2 sc no need to join
R 2 sc in each sc, 3 sc in last sc and as you continue to the other side sc in each sc and 3 sc in last
depending on how thick you need the bottom, continue in the same increasing in last sc as mentioned earlier.'
In next row as in each sc but only in back loop, no increasing at corner.
Next row sc in each sc all around
sc in 1st sc, skip on sc, make 3 dc in next ch, sc in next chm skip 2 sc 3 dc in next continue in this way.
in next row, 3 dc on sc, 1 sc on top of middle dc, continue in this way to the length you desire
to make the flap, skip a st anc continue till the st before the last one.
in each row skip the 1st and last st. to the length you desire
in the last row in the centre st make 3/4 c depending on the size of the button you want to put.
continue till the end and fasten off.
for the handle you can make 10 ch, next row sc over each ch, continue in this way to the length you want, join the sides seeing the center.
I joined in the last row before the flap, by folding it, find how many sc I need to make each side to get 10 sc, then last row seeing the center, joined accordingly.
For my other blogs, I'm giving the links below, feel free to view and comment too.