Stacking aid for apothecary glasses with wide neck

Since many years we use different apothecary glasses with wide neck for our spices. To safe some space we stack the 250ml glasses, but if you pull at the drawer they fell - that's pretty clear. To prevent this I've designed a stacking aid in two versions, one with 12mm and one with 22 mm upper rim. The lower one have 14mm

Diameter: ~60mm and 70mm

No support needed but I recommend a brim.