Ebay offers Stanley All Day Slim 20-oz. Bottle for $13 (reg $31) with free shipping.

Product Description:
Single-use plastics can take a hike. With an iconic shape, the slim design makes it easy to pack. This water bottle uniquely opens at the shoulder so you can fill it up with ice and stay refreshed.
The 20-ounce All Day Slim Bottle is sustainable, if not slightly unexpected. Just give the collar a few twists to shut for a leakproof seal and uncap whenever you need a drink. Stainless steel construction provides ice-cold sips for hours. Whether you’re playing tourist in a new city or need a new water bottle for your tote bag, keep hydration simple.

• Dimensions (Overall): 10.39 Inches (H) x 2.89 Inches (W)
• Lid Material: Plastic
• Capacity (Volume): 20 Ounces
• Used For: Hot or Cold Beverages
• Material: Stainless Steel
• Care & Cleaning: Dishwasher-Safe