I just bought 4 of them since I was there. For me Sam's is a 300 mile drive, one way, so I stock up on things when I get the chance. I keep the plastic pails and use them for other things so that is an extra bonus, although they will get brittle in the sun so outside use has limits.Here's one from Sam's Club:
Member's Mark 4-in-1 Formula Scoopable Cat Litter, 42 lb. - Sam's Club
What is really funny though is Sams now offers free shipping with the upgraded membership so they will ship the 42 lb tubs to you free. So 4 tubs will weigh 168 lbs, get sent to you for free and only cost $39.88. I would love to have that kind of rate for sending people to places. $39.88 to send someone anywhere in the country, one way!! I suppose luggage would be extra.