What is this item? All night we are solving this. It slides open and there is tiny piece of fiam inside : r/whatisthisthing
Letter Licker Envelope Moistener – Stamps.com Supplies Store
Mailing Supplies – Stamps.com Supplies Store
Shop Finger Pads & Moisteners
Mailing Supplies – Stamps.com Supplies Store
MOHAMM 1 PC Clear Refillable Watercolors Fountain Brush Pens for Painting Drawing Art Supplies Sealer Envelope Licker - AliExpress
3 Ways to Seal an Envelope - wikiHow
Sortkwik Fingertip Moisteners, 1 oz, Pink - mcdanielbizsupply
10 Pieces Pencil Style Moistener Stamp Envelope Moistener Mailing Letter Sealer Envelope Licker for Office