Hand Warmer

Last year, my wife went through multiple of those hand warmer + Battery pack combo and they all seems to work couple times and does not last a full season and they arent that cheap so I designed a hand warmer thatDoes not have battery includedDumb enough that it is virtually indestructibleDesigned to be 3d printedHave both warm and hot modeWide flat surface that can be customized and printed on the build plate What you will need!4x M2x6 button head cap screws1x Cooper or aluminum plate with 80mm diameter and 0.8mm thickness. Copper = slower warmup, better heat retention. Aluminum = faster warmer, less heat retention.1x heating element rated around 12v 1A that fits on the plate1x PD trigger1x Neutral cure electronic grade silicone1x Spool of filament that can withstand heat! DO NOT USE PLA or PETG!1x Battery or power adapter that can provide 9v and/or 12v Optionally, you can get better/flushed look if you have clamps to hold everything together while silicone cures. Below are the amazon