Stock up on popular kids’ snacks and drinks at Costco! Through August 28, the following 10 products have instant savings in addition to already low Costco pricing. Kellogg’s Rice Krispies Treats are a favorite in my house. A 54-count box is $10.99, but there is a $3.00 instant savings that reduces the price to $7.99. That’s just $0.15 for each treat.