Is this official Boston Bruins merchandise?

No. It is a fan-themed sticker built around Pastrnak's "Pasta" nickname, not licensed NHL or team product. Buy it as a fun fan item, not a collectible.

Will it survive on a water bottle or car window?

Vinyl stickers of this type generally handle washing and weather, but adhesion depends on the seller's material. Clean and dry the surface first, and avoid dishwashing if the sticker is paper-backed.

How big is the sticker?

Sizing is set by the seller and is usually small, in the laptop-decal range. Check the listed dimensions before buying if you want it for a cooler or car window.

Can I remove it without damaging my laptop?

Most vinyl peels off cleanly, but residue can stay on some finishes. Warm the sticker slightly and peel slowly; test on a hidden spot first on painted or coated surfaces.

Is it a good gift for a Bruins fan?

Yes, if they enjoy the Pastrnak "Pasta" jokes. It is a small, inexpensive fan item rather than a display piece, so pair it with something bigger for a main gift.