Change to Bundles

change the limit from "one stack" to "64" items. 
currently, items that stack to 16 (like snowballs and eggs) takes up more space in a pouch
than items that's stackable with 64 items. 
it'll allow for better inventory management, and you'll be able to actually carry more items (having 4 stacks of items that stack with 16, in one inv slot) 
which also will allow people who are exploration heavy, to bring home more items when exploring, and will both encourage people to explore for longer.

Example
(we have 3 different types of chicken. their eggs only stack by 16. so instead of only being able to have 16 eggs in a bundle, which is 5.3, so you'll only be able to have 5 of each egg, and an egg only have a probability of 5% to hatch a chicken, then instead, you'd be able to carry 3 x 16 eggs in ur slot, making you able to collect more different eggs, but also make it more worth it to explore different biomes)
it will also make it worth it to keep items in your inventory, such as ender pearls, because it takes up so much more space, then throwing it away is better so you instead have a spot for items that stacks by 64