White Straw Cap Unit for Thermos FKA-500 - Model Name: FKA-500 Straw Cap Unit - Color: White I bought a dark gray Thermos FKA-500 vacuum-insulated stainless steel bottle, which is lightweight, to use while cycling. I wanted a white cap, so I purchased this item. The main bottle arrived before this item, but I didn't like the color, so I listed it on Mercari. As a result, I have no use for this item, so I am listing it for sale. Thank you for looking.