Rin's Jewels - Has Blank Amount / can carry blank amount without resupply

Tohsaka Staff - Blank Amount of Reserved power/ Can be used to cast blank amount of spells.

Kayneth's spell is alchemy not a living breathing creature. Restrictions on how easily you can control it/how many vials you have.

Kiritsugu's Bullets = Blank amount/ carries blank amount per number 

Easy.