The Rambler from YETI could quite possibly be the perfect outdoor flask. It's double-wall vacuum insulated to keep your drinks hot/cold, can be popped in the dishwasher for easy cleaning and features YETI's clever Chug cap. With the lid on, it's a useful handle, with it off you've got a spout for easy 'chugging'.

Features:

• Dishwasher safe
• TripleHaul handle
• Vacuum insulated
• Easy to clean