I have noticed, and this would really come in handy. I have noticed
Air-Infused spring water(stacks to 100), ans Miraculous tea of protection (stack to over 20, but grey scales(stacks to 50), and Food of the master chef(stacks to 20). Since the scales help with tradeskills would be awesome if they stacked like the waters. The miraculous food quest I think if they both stacked the same would help out. not to 100, but maybe 50. Its hard to keep going back when u need food hehehe
Just a thought.
Thanks
Vanquish