Wizard golems

[Weavel]

Dude, all you need is a glass. Pour your chemical from your beaker/watering can into the glass, stick your watering can in your backpack, and cast the spell from the glass. Easy-Peasy

The problem with that is that the glass disappears when you use it. Now, you've got to have 7 glasses ready to go and a watering can AND space for your staff, so you can put it away, take out the can, pour it into a glass, put it away, take out your staff, and THEN you're ready, discounting any recharge or other problems.

Basically you need to hide and drop all your shit so you can prepare something weak that takes ages to recharge.