Design For Living 5097664 6-Piece Stackable Water Bottle Set with Spill Resistant Lid, Assorted Contains two 32 oz bottles and four 16 oz bottles. Easy twist-on, twist-off cap with no exposed threads makes it comfortable to drink from. Made from durable, commercial quality, food-safe tritan plastic; odor and stain resistant. Patented lid design securely locks the cap in place creating a water and air-tight seal, without leaks. Dishwasher Safe (Top Rack).