Woot has 40-Oz Hydro Flask Stainless Steel Water Bottle w/ Wide-Mouth Flex Straw Cap (Violet) for $22.99. Shipping is free w/ Amazon Prime or is otherwise a flat $6 per order.

Thanks to Deal Hunter phoinix for finding this deal.

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Product Details:

• Double-wall vacuum insulation keeps drinks hot or cold for hours. The insulated water bottle keeps beverages cold for 24 hours. The TempShield insulation keeps drinks cold all day.
• The Flex Straw Cap is leakproof when closed.
• Durable pro-grade stainless steel ensures pure taste and no leftover flavor transfer.