I guess it depends on how much bulk you are buying at once, but most bikes are compatible with a basket of some kind. A bike trailer could also be an option. I

I guess it depends on how much bulk you are buying at once, but most bikes are compatible with a basket of some kind. A bike trailer could also be an option. In the Netherlands you'll see Bakfiets/cargo bikes. https://www.bakfiets.com/ https://www.bakfiets.com/