Cirkul 22 oz White Stainless Steel Bottle Starter Kit with Blue Lid and 2 Flavor Cartridges (Fruit Punch & Mixed Berry) scores 90/100 on Scout's independent analysis of ingredients, additives, and lab results — one of the stronger scores in Scout's catalog. Stainless steel is what touches the drink — inert food-grade steel that doesn't leach or shed microplastics.

In Scout's ingredient-by-ingredient analysis, Stainless steel (body) counts in its favor, and BPA-free plastic lid, spout or straw is flagged as an ingredient of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.