I have 3 of these drawer types: https://www.amazon.com/American-Security-Hide-A-Safe-Handgun-Safe/dp/B00VS9G6O6
2 mounted in my bedroom for his and hers bedside gun storage and one in my walk in closet for my OC piece. Sturdy and fool proof. I've had many 'auto-open' and bio boxes before and they all kinda sucked in some way or other.
Disclaimer, these (and most small boxes) are only to keep small children out of and shouldn't be considered a safe. That's what my safe is for.