Why have a threesome when you can have a fivesome? The Monster Towel is the World's Orgy-est Beach Towel! Oh, uh, I mean, the World's Biggest Beach Towel! At least that's what the people who make the 10' x 10' Monster say. I haven't tried one, but I'll grant that it appears to fit 5 normal-sized, supine-lying adults quite comfortably. And if one happens to roll over...things get even more comfy!
It's 100 square feet of area makes the Monster Towel larger than a king size bed, so even better to use when you and your partner just want to get some sleep, but know you'll inevitably have your space crashed by your 3- and 5-year-olds. Available in blue or green, the towel is made of highly absorbent microfiber that is happy to shed itself of sand with a shake. It also has 4 corner pockets for anchoring it to the beach or grass, plus a zipper pocket for storing keys and wallets.