Gridfinity Bin for gallon size ziploc baggies (3x7x7).
Use 6mm x 2mm magnets to hold halves together and lid on. Requires 6 to hold halves together and has spots for 28 to hold lid on, but only takes 12 to hold firmly.
Print lids face down for smoother finish. All can be printed without any supports!
Update:
Added version that isn't split just incase you have an XL.
The author marked this model as their own original creation.