Hey all. I want to get started on food storage and emergency preparedness. My ideal situation will be to add a bit of food or emergency goods each time we grocery shop. I'm trying to do this as economically as possible. I use whey protein for workout supplement and they come in big tubs. I realized that these things must be food safe so I decided to start using them for dried goods. Do you think the screw cap will be a good enough seal? The other thing I'm wondering is vacuum sealing vs Mylar. I see the Mylar keeps light out, but is the clear vacuum seal bags a bad way to go especially if I have access to the equipment?