Red plastic

Hi all, you'll notice next time you're at the garden that our two tomato plants have red plastic around them. This is something my mom gave me and swears by for her tomato plants the last couple seasons. I'm not sure about the science behind it, but it supposedly helps produce higher yields. Anyway, I have a some left over, probably enough to go around 2-4 more tomato plants. If anyone would like to try some, just say so, and I'll leave the extra at the garden next time I go. Just didn't want anyone to think it was trash.