The Wide Loop Cap is leakproof and creates a 100% stainless environment inside your bottle. Made from 18/8, food-grade stainless steel, so your drinks never touch plastic. Easy to carry with swivel bale. Dishwasher safe. 
NOTE: Compatible with Wide mouth bottles only (with external threads).
Features:

Cap creates all-stainless interior
Handy attachment loop
Cap is Leakproof
Dishwasher safe
Compatible with Wide Klean Kanteens only