Freezer Bag Clip with Month Marker

"When did I freeze this?" A bag clip that answers it. Months 1–12 along the top and a red marker that clicks to the right one.

Update v3 (October 28): tested in a real freezer bag and reworked.

• The sleeve was far too tight: the bar now has 1.4 mm of room in thickness and 1.6 mm in height, the bar edges are chamfered, its tip is pointed and both ends of the sleeve flare open. It slides in with the bag around it.

• The marker could fall off. It now runs in a dovetail along the back of the sleeve, clicks into a notch at every month and stops at the closed end.

• One scale only, the months: with months on one face and days on the other, you could not tell which one you meant.

• The months are now inlaid in the first layers and the markers have their own file, so the MMU purge tower is only 0.6 mm tall instead of the full height.

How it works

• Lay the bar on the bag opening and roll the bag once around it.

• Slide the sleeve over the bar from the end, months facing you. The bag comes out through the slot along the front edge, below the numbers; the bar's tab stays outside so you can pull it out again.

• Click the red marker to the month you froze it. To fit it, slide it into the dovetail from the open end of the sleeve (the end without the stop).

Sizes

• Sleeve 170 × 18 × 7.8 mm, bar 182 × 12 × 3.2 mm: fits freezer bags up to about 18–20 cm wide.

Print settings

• PETG recommended for the freezer (PLA gets brittle in the cold); PLA works for the fridge or the pantry. 0.2 mm layers, everything flat, no supports.

• pince-date.3mf: sleeve and bar, red in slot 1, white in slot 2 (MMU3). The months are a 0.6 mm inlay printed face down (mirrored on the plate), so colour changes stop after the first layers. For one colour, print the plain STLs.

• curseurs-rouge.3mf: two markers (one spare) in red, printed standing on their profile. A brim helps them stay put on the bed.

Accuracy

If the marker is too stiff or too loose in the dovetail on your printer, tell me and I will publish a variant.

Designed with AI assistance (parametric Python script, manifold3d).

En français

Pince à sac de congélation avec curseur de mois. On enroule le sac autour de la barre, on glisse le fourreau par le bout, et on clique le curseur rouge sur le mois de congélation (1 à 12). Le curseur court dans une queue d'aronde et s'enclenche à chaque mois : il ne tombe plus. Pièces à plat, sans supports, mois incrustés en deux couleurs. PETG conseillé pour le congélateur.