I dont use yoghurt any more, I make kefir in 1 litre glass jars with lids. I litre of kefir costs whatever you pay for a litre of whole milk, organic non homogenised costs me £1.55 and no heat is involved. It is beautiful and I love to handle the jars, which are curved to be safe in the hand. I also have a special lid which releases the gas build up as the kefir is made. Then after straining, it keeps in my fridge for a week, in a storage jar
Re cream, I too hate those awful lids that aren`t lids. I don`t buy it any more, except if I want to make ice cream, when I use the whole container plus kefir plus berries