Lush Water Bottle

Lush Cosmetics White and Blue Water Bottle "Take Back The Tap". Made in the USA engraved on lid. These were sold starting around 2013. Has some discoloration on the bottom of the inside. I have tried cleaning it using a bottle brush cleaner with bleach and have also ran it through the dishwater but it will not come off. Made by Liberty Bottleworks. Approximately 8.5 inches tall without the bottle top, 10 with the top and almost 9 inches around. Will consider all offers due to discoloration.