MEWAY 30oz Stainless Steel Vacuum Insulated Tumbler with Lid & Straw - Double Wall Coffee Cup for Hot & Cold Drinks - Durable Powder Coated Travel Mug for Office, Gym, Camping & Outdoor Activities (Army Green, 8 Pack)

I bought these tumblers after seeing the prices of plastic double-walled tumblers which were selling for $40 to $30 for two. I bought 8 (eight!) MEWAY tumblers for $63. $7.85 for a metal tumbler vs. $15 to $20 for plastic. Different color combinations are available for slightly more, but I preferred the color you see.The tumblers are advertised as 30 oz. but hold 32 oz. They are identical to my name brand tumbler (a gift) that cost more than all 8.The lid has a double ring seal and fits tightly, but it will leak from the straw and vent holes if the tumbler is knocked over.The tumblers come with eight 9.5" straight metal straws, eight 10" curved metal straws, four 10" small brushes for cleaning inside the straws, and four small sponge swabs for cleaning inside the tumbler. I prefer the safety of a long plastic straw, and my hand fits far enough into the tumbler to use a regular sponge, but it's a nice feature.Finally, these tumblers keep drinks cold. I put 32 oz. of half ice cubes/half water in a tumbler, and put it on a kitchen counter where the average ambient temperature is 72°F. The beginning temperature of the water was 32.2°F. Twelve hours later the water temp was 33.4°F with some ice remaining. Twenty-four hours later all the ice was gone, but the water temp was 48.8°F, still cool enough to be refreshing.These tumblers are as good as my name brand tumbler and well worth the price.