TWSBI Diamond 50 Ink Bottles- Blue Brand_Simply Tidy *The 5-Year techo does not

*The 5-Year techo does not fit in covers meant for standard one-year techo books

The experience doesn’t end there

The A5 Sketchbook fits easily in your hand which makes it travel-friendly

The ink is alcohol-based and quick-drying

TWSBI Diamond 50 Ink Bottles- Blue Brand_Simply Tidy *The 5-Year techo does notTWSBI Diamond 50 Ink Bottles Blue TWSBI Diamond 50 Ink bottle: designed for every type of fountain pen and specific upper cap design for Diamond , 530, 540, 580, Mini fountain pen. No ink inside The TWSBI Diamond 50mL ink bottle is a glass bottle with anodized aluminum top that is the perfect accessory for any fountain pen addict! The bottle allows for easy refilling of your fountain pen by offering an upper reservoir that fills with ink when you turn