Don't limit yourself to conventional items... even a couple of heavy bags of dog food will work! (muscle-fitness-training.com)
If you are doing this with a bike that's loaded with heavy bags it's very easy to get knocked over and risk injury to yourself and your bike. (bikefriday.com)
We are also more than happy to assist clients in carrying heavy bags of food or transporting pets to vehicles if needed. (centralbrowardvet.com)