This weekend exciting project is to sort out food cupboard. (again). I don't understand storage jars. Please can someone explain them to me. For example you buy a bag of rice. I doesn't all fit in the jar so you put the rest of the packet in the back of the cupboard. Jar is running low. Buy more rice. Put packet in cupboard until jar is empty so as not to mix old rice with new. When empty find new packet of rice put in jar. Some doesn't fit so put at back of cupboard then find other left packet bits. How is this supposed to work? I seem to have lots of packets with a bit left in. Jars waiting to be emptied to put new packets in. Failing at housewifery again.