Stanley, YETI and Brümate tumblers and travel mugs are on sale for October Prime Day — as low as $18

Everyone's been raving about the Stanley Quencher, but its long-standing best-selling travel mug is its first major product win. It's leak-proof, comes in two sizes (16 oz and 20 oz), has double-walled vacuum insulated, packs both hot and cold drinks and is literally made for traveling.

It keeps drinks hot for up to seven hours, cold for up to 10 hours and iced for up to a whopping 30 hours.

Gorgeous aesthetics aside, this tumbler is one of the most practical gives its size and performance. It's 100% leakproof and is heavily insulated. Shoppers also particularly love that it has a sturdy handle that most travel mugs and tumblers don't have.

It comes in multiple colors and finishes, has a double-threaded lid for maximum sealing and keeps drinks hot or cold for hours on end.

YETI is known as the tumbler brand with the widest color assortment and this one's no exception. This vacuum-insulated, stainless steel stackable travel mug comes in a whopping 25 colors. The MagSlider Lid adds a barrier of protection for keeping drinks contained and preventing heat or cold from escaping. however, the lid is not leakproof and won't prevent spills like some of the others on this list.

The XL version of the best-selling BrüMate Toddy is becoming a quick customer favorite. It's fully leak-proof just like the smaller version and has double-walled insulation. It's ideal for hot, cold and carbonated drinks as it holds everything in while keeping your drinks fresh and at the right temperature for longer.

The YETI Rambler is so popular that you've likely seen one in the wild at least two or three times. Hundreds of thousands of Amazon shoppers can't stop raving about this vacuum-insulated tumbler. In fact, it has over 123,000 five-star ratings on Amazon.

The Rambler also comes in a larger 30 ounce size that's perfect for storing coffee or lots of color water to keep you hydrated throughout the day.