Are bottles, utensils and tumblers 100% titanium?

Sure, they are 100% titanium and made of titanium Grade 1.

Can I put the bottle in a fire to boil water?

Generally you can, just remember to remove the silicone ring from the bottom and always keep the lid off when boiling.

Will the bottle be hot if I put hot tea or coffee into it?

Yes, it will as titanium is a heat conductor. Be careful not to burn yourself! Use a protective sleeve included to protect yourself from both heat and cold.

Does it taste metallic when you put hot coffee in it?

No, it doesn’t as titanium doesn’t impart odor and taste to drinks.

Do bottle and tumbler fit in car holders?

Yes, they do fit most of the car holders.

Are utensils allowed in carry-on luggage?

You may want to check with TSA Rules and Regulations, but generally such items as knives and even forks are not allowed on board.

Can I machine wash the belt bag?

No, these bags shouldn’t be washed, but you can clean them with a piece of fabric.

Are t-shirts and hoodies machine washable?

Yes, they are, but look into the item's description for more precise instructions for merino clothes.

Do merino clothes require careful handling and washing?

Not really. You should be careful not to wash it in hot water and not to tumble dry, but otherwise it is quite handy: don’t need to be washed often, dry out quickly, don’t crease much and keep its shape.