I have amended the title slightly to reflect that we are discussing cold pressed products as opposed to extruded/baked. I thought about adding it to the cold pressed thread but I think it might confuse the flow of it as we are currently having a discussion on there too so I will leave this one as it is but will provide a link within the main thread. The cold pressed food thread is here.
Following on from the discussion of saving money, the 15kg size is much more economical so it is worth buying it and looking round for a suitable storage container. If anyone can find something that meets their criteria in terms of non airtight then please post it in this thread. I am wondering if one of those pedal waste bins might be suitable, particularly as it would be very easy to scoop the food out. Could you let me know what you think about this? Perhaps you could check with Gentle? They can be bought in various sizes and are not usually expensive, depending on the type chosen.
On the subject of cost, I was able to purchase Gentle from my local pet supplies shop (15kg size only) and found it reasonably economical considering that it is a quality product. Also, at the time they didn't need very much (the tiny amount was the problem). At the current price it comes out at £3.96p per kg (inc. delivery) when purchased from the shop. Might as well add a couple of small bones to the order then delivery is free (needs to be above £59 to qualify).
Following your example, I have done some sums and if I went back to Gentle it would save me money but not very much if I continue to top up with commercial wet food. However, all cold pressed foods are complete and shouldn't need topping up. In any case, when my lot are on dry food I like to complement it with a little home cooked food which tends to be cheaper. Worth thinking about.