Insulated swamp cooler tub

Any one using one of these on their tubs for their swamp coolers?
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Where did you get that, I like it!

Looks like it would work. Doubles to keep the light out. I’m also curious where to find one or two of these

I found these on clearance at Walmart. I bought two and only gave $7.50 each for mine. They are Homz brand and fit 18gal tubs. Each cover is two pieces and the entire top comes off for easy access.