My problem down under was the shear COST of buying ready made spotters.
I started with a small 250ml (8 ounce I think from memory) bottle and made my own. They had a flip top and I had a free unlimited re fil policy.
After a couple of months of that, and the responses were great, I bought bulk and went up to a 500ml (16 + ounce whatever that works out in your measuements - pint?) and swapped to a trigger top.
The response is even great if that possible.
A couple of reasons for the larger size, I reckon a trigger top is easier to use, and uses the fluid more sparingly and the trigger makes the 250ml bottle top heavy, even when full. Secondly, when buying in bulk, the two bottles were very close to the same money so the main cost difference is the extra product.
At this stage we do it all in house and my cost is somewhere around $2.30 each. The nearest bought product back 6 months ago was around the $5-6 Australian dollors so add at least 20+% for exchange and freight import etc.
We use a thermal printer (dnside of that is single black or greyscale graphics) but it eliminates distortion of info when wet and the labels stick really well.
Nothing like the class of the other products shown, but works well for us.
John