Something's been chronically eating the seed leaves of my sunflowers! I keep replanting and replanting, but all of them are eaten without fail. I think it's either slugs or mice. I've tried a variety of traps/baits/barriers to no avail.

Now I'm thinking of cutting a small water bottle in half and placing the top half over the emerging seedlings until they grow true leaves. The top will be uncapped to let in water, but I'm worried if the sunflower would get enough sun through the clear plastic and condensation. Do you think this is will be effective?