Are Stanley Cups Worth it? 

Stainless Steel: Most Stanley water bottles are made of high-quality stainless steel, which is known for its durability and resistance to corrosion. Stainless steel is generally considered dishwasher safe, allowing you to clean your water bottle conveniently.

Stanley Comes with BPA-Free Plastic:

Silicone Components: Certain Stanley water bottle models may include silicone seals or gaskets. Silicone is a dishwasher-safe material that can withstand high temperatures without any adverse effects.