It is going to be hard to find a first aid pouch that will hold all those items (assuming you meant 1000mL not 100mL) that isn't going to be bulky. My suggestion would be to separate the IV supplies from everything else... IVs are not immediate treatments and those supplies can be carried in a separate pouch or in a bigger kit.
And if you did mean a 100 ml bag, what the heck for? Mixing meds is about it's only use, as it's almost useless for fluid bolusing to someone. You're better off drinking a glass of water or gatorade (which is twice the volume)