What are these stickers made of?

They are vinyl stickers with a glossy paper finish and a strong acrylic adhesive backside. The surface is described as scratch-resistant and long lasting.

Can I put them on a water bottle?

The vinyl surface and acrylic adhesive suit flat, smooth surfaces like bottles, laptops and cases. They are not rated for dishwashers, so hand washing is safer.

Use a soft, clean, dry cloth and gently brush dust or dirt from the center outward. Avoid soaking or scrubbing the sticker.

Is this a pack of different characters?

No. It is a single Crunchyroll Source design, not a mixed character pack. Check the artwork before buying if you want variety.

Will they come off cleanly?

The adhesive is strong, so expect them to stay put. Peel slowly if you reposition one, and note that vinyl stickers can leave residue on some surfaces.