Olicamp Space Saver Mug/Nesting Cup w. Handles

This is a hard anodized aluminum cup that holds 24 oz of liquids. It also has gradation markings up to 20 oz on the outside of the cup. Almost all 32 - 40 oz bottles fit inside this cup, including Get Real Survival's RapidPure Water Bottle and Filter and the Vargo Quart Sized Stainless Steel Bottle and it has folding handles so it fits inside most water bottle holders. I do recommend using the Large Water Bottle Holder with this and most other nesting cups because the cups fit inside it much easier than standard sized water bottle holders. It fits very easily into the Get Real Survival Ultralight Water Bottle Holder, however.   This cup is also big enough to boil water for freeze dried meals and makes a great drinking cup too (well, duh!!!). It's not super expensive either.