milk containers, the white plastic ones, can be hard to cut with regular scissors, but i have found that they cut easily enough with pinking shears to make good looking plant labels. The same 4 pint containers can be divided into 4 internal sections using cut lids from takeaway containers,,plant up sweet peas, or anything needling long root space,,when ready to plant out just use a craft type knife to cut around the bottom of each sectiona and then up the sides to allow one section to fall gently into your hand,,place the plastic with the seedling lying in it into the hole then gently pull out the plastic,, perfectly planted sweet peas with no disturbance of the roots.