SiskiyouNCAA Unisex Home State Decal

Do these stick on a water bottle?

Tons of confusion around the heart vs the helmet. How do I ensure I get the heart?

Does this sticker go on in the inside or outside of the car?

Some of these decals come with a ‘heart’ or a ‘helmet.’ I’m looking for the ones that have a heart. Who can help me with that?