HotHands Hand Warmer Value Pack 40 Pair – on sale now on Amazon.com for $14.99 Free Two-day Shipping for prime members
https://www.amazon.com/dp/B077SBNNWN
The lowest price I found for this product is $4.12 for a 10 pk which comes to $16.48 for 40 pairs, so this is a real good price $14.99 delivered for 40 pairs.
The only downside I see is the shelf-life showing 6-10 months but it’s plenty of time to last thru the winter season.
Edyy