The Stanley IceFlow Water Bottles in 30oz size are on sale for 20% off right now. There are limited color options but that brings the price down from $31 to $24. Sales are incredibly rare on these so click here to take a look.
Use code BRAND20 at checkout.
Also just a note that the Stanley 40oz tumblers are not on sale but they are in stock at the normal price of $45 in multiple colors. These keep selling out so click here to take a look.