In a tiny hamlet called Shinglab in Gazipur district, around 2 hours from Dhaka, you can see a cluster of homes made of varying materials depending on the household income.
Shamela Hakeem, 40, lives in a functional mud hut with a tin roof. A widow with no children, she makes around BDT 300 ($3.50) daily as a sweeper at a local factory.
Last year,. She is due to pay off her final installment within the next month.
But why did she decide to invest in a toilet?